Can you tell me if this letter is correct? Thank you in advance.

Dear Sir or Madam:

With effect from August 10th, 2005 the head office of (NAME OF THE COMPANY) has relocated to larger premises. Our new address is as follows:

ADDRESS:

TEL.:

FAX:

EMAIL:

There has been no change in management and we will be providing the same products and service.

Yours faithfully,

(signature)
I myself would change With effect from August to Effective August; other than that, it reads fine to me.
Thank you for your answer.