Good question.
The books would appear to indicate that you do not need to pass the wind although I'm not sure if there are many Uk airfields who do not pass it with the take off clearance.
Reference
CAP413 Chapter 4 1.7.2
Take Off Clearance
Controllers will use the following phraseology for take off
G-CD cleared for take off
**The surface wind will be passed if there is a significant difference to that already passed.
From the above then, assuming that the ATIS letter hasn't changed from that given at start up, is it necessary to pass the surface wind to departing traffic as there has been no significant change to the wind given on the ATIS?
CAP493 also gives the option of a simple "cleared for take off" in it's phraseology section with the condition that an instant wind will be given to the pilot if requested.