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Contact details for top business energy suppliers

Are you looking for the contact details for your business energy supplier? We’ve created a list of the contact details of the top business energy suppliers so you don’t have to spend valuable time searching for them.

British Gas Business

British Gas is the biggest energy provider in Britain and supports over 500,000 businesses across the UK with not just gas and electricity but maintenance and renewable energy. They work with both small and medium sized businesses as well as large industrial and commercial businesses.

Contact Details
Tel: 0845 600 0604
Fax: N/A
Post: The Retention Team, British Gas Business, Spinneyside, Penman Way, Grove Park, Leicester LE19 1SZ
Notice required to terminate: between 120 to 90 days ahead of contract end date

CNG – Contract Natural Gas

CNG has been around for almost 20 years. The company was established in 1994 in the early years of deregulation with the aim of becoming more progressive and focussing on the customer. The company plans to move into the electricity market in 2016.

Contact Details
Tel: 01423 502554
Fax: 01423 502556
Post: Contract Natural Gas Ltd, CNG House, 5 Victoria Avenue, Harrogate, North Yorkshire HG1 1EQ
Notice required to terminate: 90 days written termination ahead of contract end date

Dong Energy

One of the largest business energy suppliers in the UK, Dong Energy currently supplies gas to all business customers and industrial users but plans to supply electricity to all customers by 2015.

Contact Details
Tel: 020 7451 1906
Fax: 020 7451 1851
Post: DONG Energy, 1-3 Strand, London, WC2N 5EJ
Notice required to terminate: 120 Days

Dual Energy

Dual Energy is a UK owned business energy supplier providing business electricity to businesses. Customers get a free smart meter, which ensures bills are accurate and means you don’t have to remember to send meter readings. However, it’s always advisable to keep a note of how much energy you are using.

Contact Details
Tel: 08455 214 291
Fax: 01473 707184
Post: Dual Energy, Premium House, The Esplanade, Worthing, BN11 2BJ
Notice required to terminate: 28 days before contract end date

EDF Energy

EDF Energy is one of the Big Six energy providers supplying around 6 million domestic and business customers with electricity or gas. EDF generates around 20% of the country’s electricity with more than half of it coming from nuclear power stations.

Contact Details
Tel: 0800 096 2255
Fax: 01273 793 114 (All Faxes must have a subject of ‘Site Loss’)
Post: EDF Energy, Southdown View Road, Worthing, West Sussex BN14 8NL
Notice required to terminate: at least 28 days ahead of contract end date

Extra Energy

Extra Energy is a new energy supplier for both homes and businesses with a mission to generate cost savings which they pass on to their customers. By keeping their costs low through efficiency measures their customers benefit from the savings they make.

Contact Details
Tel: 0800 953 4774
Fax: N/A
Post: PO Box 10243, Unit 16, Coalfield Way, Ashby De Le Zouch, LE65 9ED
Notice required to terminate: 90 days

Gazprom Energy

Parent company Gazprom supplies 18% of Europe’s gas and is one of the world’s biggest gas companies. Gazprom Energy started supplying gas to businesses in 2006 and in 2009 entered the electricity market. The company supplies traditional and renewable electricity.

Contact Details
Tel: 08452 302 058
Post: Gazprom Energy, Bauhaus, 27 Quay Street, Manchester, M3 3GY
Notice required to terminate: micro business 30 days before contract end date, non micro business 90 days before contract end date

Haven Power

Haven Power is a business electricity supplier. The company aims to provide businesses with simple, flexible contracts designed specifically for them. Haven Power was launched in 2006 as an alternative to the Big Six. The company was acquired by Drax in 2009.

Contact Details
Tel: 01473 707755
Fax: 01473 707184
Post: Haven Power Ltd, The Havens, Ransomes Europark, Ipswich IP3 9SJ
Notice required to terminate: 90 days ahead of contract end date

Hudson Energy

Hudson Energy is an American company and leading retailer and supplier of green energy in North America. The company is one of the biggest business energy suppliers in North America and joined the UK business energy market in 2012.

Contact Details
Tel: 01908 880453
Fax: 0203 0311470
Post: Hudson Energy, 219-225 Avebury House, Avebury Boulevard, Milton Keynes, MK9 1AU
Email: or
Notice required to terminate: no notice required

LoCo2 Energy

As the name suggests LoCO2 is a British renewable energy and low carbon electricity supplier. The company was founded in 2009 but has been actively involved in the renewable energy industry for over 10 years. Along with its sister business TLS Hydro, LoCO2 owns and runs its own hydropower plants throughout the UK.

Contact Details
Tel: 0845 074 3601
Fax: 0845 074 3602
Post: LoCO2 Energy Ltd, 1st Floor, Batchworth Lock House, 99 Church Street, Rickmansworth, Hertfordshire, WD3 1JJ
Notice required to terminate: 90 days before contract end date

Opus Energy

Opus Energy is a leading independent supplier of gas and electricity to over 200,000 businesses across the UK. It supplies energy to both small and medium businesses as well as larger corporate clients and institutions. The company also purchases power from renewable generators in the UK.

Contact Details
Tel: 0843 227 2377
Fax: 0845 223 5445
Post: Opus Energy Limited, Royal Pavilion, 2 Summerhouse Road, Northampton NN3 6BJ
Notice required to terminate: at least 90 days ahead of contract end date

Ovo Energy

Another new business energy supplier, Ovo Energy was founded in 2009 by Stephen Fitzpatrick who didn’t come from an energy background. He didn’t have any preconceived ideas about how things are normally done – just how they should be done from a customer’s perspective. Ovo supplies business electricity with just two simple plans.

Contact Details
Tel: 0800 358 3529
Fax: N/A
Post: Ovo Energy for Business, 40 St Thomas Street, Bristol, BS1 6JX
Notice required to terminate: 90 – 60 days ahead of contract end date – no automatic rollovers.

Smartest Energy

Smartest Energy was founded in 2001 buying its energy from the independent sector. Smartest Energy supplies both conventional and renewable electricity to large industrial and commercial organisations.

Contact Details
Tel: 01473 234100
Fax: 01473 234170
Post: Grafton House, 15-17 Russell Road, Ipswich, Suffolk, IP1 2DE
Notice required to terminate: No notice required. Provided there’s no debt on the account customers can leave when their contract expires.


One of the Big Six energy suppliers SSE is the second largest energy supplier in the UK. The company employs over 20,000 people across the country. The company has been supplying homes and businesses since 1947. In 1998 Southern Electric and Scottish Hydro merged to form Scottish and Southern Energy (SSE).

Contact Details
Tel: 01256 304278
Fax: 01256 304270
Post: Energy Sales Department, Scottish & Southern, Centenary House, 10 Winchester Road, Basingstoke RG21 8UQ
Notice required to terminate: at least one calendar month ahead of contract end date

Scottish Power

Part of the Iberdrola Group, Scottish Power supplies around 5.2 million customers across Britain and is one of the Big Six energy suppliers.

Contact Details
Tel: 0845 2700 700
Fax: 0141 568 3383
Post: Scottish Power, SME Contracts Manager, Scottish Power Business Sales, Section 11, Zone 23 Cathcart Business Park, Spean Street, Glasgow, G44 4GP
Notice required to terminate: between 90 and 45 days ahead of contract end date (for electricity) or 28 days (for gas)

Crown Energy

Crown Energy is the energy and utility division of Crown Oil Ltd. The company has been supplying gas and electricity for over 60 years.


Another of the Big Six energy suppliers, E.ON supplies both gas and electricity. The company employs around 12,000 people in the UK and has a number of power plants generating electricity.

Benefits of E.ON

– Additional discounts for paying your account by direct debit or paying promptly

– Access to E.ON’s Business Energy Toolkit where you can access advice, tips and help to control and manage your energy use.

– Help and advice when you need it from E.ON’s award winning and UK based customer service teams.

– Clear and simple bills with regular reminders of when your current plan is due to end.

Contact Details
Tel: 0845 300 5665
Fax: 0115 877 7514
Post: Eon Contract Terminations, PO Box 9042, Sherwood Park, Annesley, Nottingham NG15 5AZ
Email: or
Notice required to terminate: 21 day window from 120 days ahead of the contract end date

For the latest business energy news and article visit our energy section.

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Excellent, 9.4 / 10

Competent and courteous service.

"Marie was knowledgeable and helpful. I feel able to recommend the service given without reservation. David Slesenger"

This review was posted by David Slesenger on the 16th of August 2016

Good service

"Nadia was very helpful"

This review was posted by Robin on the 16th of August 2016

Excellent Customer Service *****

"Jonathan Burgess is an asset to Switch My Business. He made me feel at ease and was more than helpful at all times. He made regular contact and guided me through the whole process which made switching a breeze. I just wish there were more customer service advisers like Jonathon whose friendly and happy demeanour make your day a much nicer one. Well done Switch my business and more importantly thank you Jonathon for all your hard work! Maria Owen Lodgecrest"

This review was posted by Maria Owen on the 17th of August 2016


"I totally agree with a customer maria owen,Jonathan Burgess was such a pleasure dealing with and is truly a asset to the company, he made it very easy to switch my electricity companies, Jonathan Burgess was very helpful, easy to talk to it was like talking to a friend not just a customer adviser. I would definitely recommend switchmybusiness and try get hold off Jonathan Burgess if possible and have the same excellent service as I did. Rajan Shanan"

This review was posted by Rajan Shanan on the 19th of August 2016

Excellent and very helpful

"Arron who dealt with my switch of energy and gas has been a huge help and extremely efficienct and easy to deal with. Despite British Gas throwing obstacles in the way at every turn he has doggedly stuck to his task and saved the day. Thanks Arron."

This review was posted by Rod Pryce-Jones on the 19th of August 2016