Arranging Change of Tenancy (CoT) for your Energy Supply

EnergyBillKill’s Change of Occupancy and Change of Tenancy Guide

If you have just moved into new premises it is important to notify your business energy company. When moving into or out of a premise, the existing supplier to the premise will continue to supply energy at a deemed rate until explicitly requested not to. The new tenant is obligated to agree on a new contract either with the same supplier or with a new supplier of their choosing. This is known as Change of Tenancy.

For your convenience we have listed on this page:

  • Our

  • A check list of what to include before you send the letter.
  • A list of energy companies' addresses. You can find contact details for energy companies here.

What you will need:

  • Clear picture of the meter reading from the date you occupied the new premises
  • Name of your current energy supplier (you can find this out from Energy Distribution Network)
  • A

  • One of the following:
    a. Landlord’s confirmation
    b. Estate agent’s confirmation
    c. Solicitor’s confirmation AND Copy of the lease, freehold OR mortgage completion letter if the property was purchased

Step 1: Communicating with the energy company – Change of Tenancy Form

  • Complete the Change of Ownership or the Change of Tenancy form
  • Make a copy of the lease agreement or letter from the landlord about your new tenancy
  • Send the Change of Tenancy or the Change of Ownership form plus a copy of the lease or landlord letter to the current energy supplier

Step 2: Shop around for the best rates

  • Have the meter and current supplier information at hand.
  • Please estimate how much energy you will use in kWh during the year.
  • Use the app to see the best rates we can get for you.
  • Check out direct quotes from energy companies. has the links.

Step 3: Ready to switch

  • Please use the app to switch (iOS, Android & Web (ex. Explorer).
  • Everything is done inside the app, including signing all the switching documents etc.

Some premises have half-hourly meters (The app will ask for an old bill copy. You may email or call 0333 0508419 with questions).

  • We send all your signed contracts to the energy companies
  • Energy companies perform credit checks for your business
  • It takes 3-5 weeks to activate the new contract after the credit checks are passed.

Change of Tenancy Energy Companies’ Addresses

British Gas Change of Tenancy Contact Address

British Gas Business Ltd.                 

FTAO Terminations Team                

British Gas Business         

Spinneyside Offices          

Penman Way, Grove Park               

Leicester, LE19 1SZ

CNG Change of Tenancy Contact Address

Contract Natural Gas Ltd.              


CNG House          

5 Victoria Avenue, Harrogate, North Yorkshire     


Corona Energy Change of Tenancy Contact Address

Corona Energy   

Terminations Department                               

Edward Hyde Building    

38 Clarendon Road                            

Watford, WD17 1JW

Crown Gas & Power Change of Tenancy Contact Address

Crown Gas & Power                         

The Oil Centre

Bury New Road

Heap Bridge                   

Bury, BL9 7HY

Dual Energy Change of Tenancy Contact Address

Dual Energy  

FTAO Price Review   

Termination Department    

Premium House       

The Esplanade                     

Worthing, BN11 2BJ

Ecotricity Change of Tenancy Contact Address


FAO Business Team             

Unicorn House          

7 Russell Street                    

Stroud, GL5 3AX

EDF Energy Change of Tenancy Contact Address

EDF Energy   

SME Sales Team                   


Osprey House           

Osprey Road 

Exeter, EX2 7WN

EON Change of Tenancy Contact Address


Business Customer Service             

PO Box 2010                        

Nottingham, NG1 9GQ

Gazprom Energy Change of Tenancy Contact Address

Gazprom Energy      

FTAO Customer Services                 


27 Quay Street                     

Manchester, M3 3GY

GDF Suez (Engie) Change of Tenancy Contact Address

GDF SUEZ Energy UK                                  

No1 Leeds     

26 Whitehall Road               

Leeds, LS12 1BE

Good Energy Change of Tenancy Contact Address

Good Energy                         

Monkton Reach        

Monkton Hill             

Chippenham, Wiltshire, SN15 1EE

Haven Power Change of Tenancy Contact Address

Haven Power Ltd.                             

32 The Havens         

Ransomes Europark            

Ipswich, IP3 9SJ

Hudson Energy Change of Tenancy Contact Details

Hudson Energy                                

Elder House 3rd Floor,

586-592 Elder Gate

Central Milton Keynes, MK9 1LR, UK

LoCO2 Energy Change of Tenancy Contact Address

LoCO2 Energy Ltd (Solarplicity)                            

1st Floor        

Batchworth Lock House       

99 Church Street     

Rickmansworth, Hertfordshire, WD3 1JJ

Npower Change of Tenancy Contact Address

(NPower are to merge with EON. Read about it here.)


The Correspondence Team            

Bridge House 200 Clough Road                 

Hull, HU5 1SN

Opus Energy Change of Tenancy Contact Address

Opus Energy Ltd      


Royal Pavilion           

2 Summerhouse Road         

Moulton Park Northampton, NN3 6BJ

Orsted Energy Change of Tenancy Contact Address

5 Howick Place



Ovo Energy Change of Tenancy Contact Address

Ovo Energy                           

The Core       

40 St. Thomas                       

Bristol, BS1 6JX

Regent Gas Change of Tenancy Contact Address

Regent Gas Ltd                                 

House Kendal Avenue                     

London, W3 0XA

Scottish Power Change of Tenancy Contact Address

Scottish Power          

SME Contracts Manager      

Business Sales          

Section 11, Zone 23 

Cathcart Business Park       

Spean Street 

Glasgow, G44 4GP

Smartest Energy Change of Tenancy Contact Address

Smartest Energy                              

Grafton House          

15-17 Russell Road              

Ipswich, Suffolk, IP1 2DE

SSE Change of Tenancy Contact Address

Scottish & Southern Energy

PO Box 6302



RG21 8WR

Total Gas & Power Change of Tenancy Contact Address

Total Gas & Power                            

Bridge Gate   

55-57 High Street                

Redhill, Surrey, RH1 1RX

Yu Energy Change of Tenancy Contact Address

Yü Energy

Unit 2, Horizon Place,

Mellors Way,

Nottingham, NG8 6PY”

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