Googling reveals that there was (is?) a Victoria Wine at that address, tel: 01895 621050, but this does not accept incoming calls. The Victoria Wine store finder doesn't find one at that address, so maybe they have moved.

A look back at Holiday Mood's website from March 2005 on Internet Archive here reveals another address:
Canada House, 272 Field End Road, Eastcote,
Ruislip, Middlesex HA4 9NA

Perhaps they have moved within the last year. 

nannamoon1 wrote on Oct 2^nd, 2006 at 2:47pm:

The thing is, if they've never published it then we aren't likely to find it! They may or may not have changed their 01895 numbers when they moved.

The only lead is the telephone number for Victoria Wine, although it's not accepting incoming calls, I suppose Holiday Mood could have kept it at that address and that they might have a block of numbers relating to this one. So you could try nearby numbers like 01895 621051, 621052 etc. Also, go down in the other direction: 01895 621049, 621048 etc.

That's all I can suggest at the moment I'm afraid.