123 My Street
					Mytown
					Mypostcode
					1 April 2000

Seller
Address
Postcode


Dear Sir/Madam

<reference/invoice No etc>

I am extremely concerned about your delay in completing 
the [work] contracted for the above address.

Prior to my accepting your estimate for the work I was 
assured the work would be completed by (date).  [number] 
weeks/months later the work is still incomplete [details 
of work still to be done].

I am therefore making time of the essence in this contract.
If you do not complete the outstanding work within 14 days
of the date of this letter, I will have no other option 
than to get another firm to complete the work, deducting 
the cost from the balance owed.

Yours faithfully

<myname>