> Thanks for that, it now works if I dail the full UK number (020 8XXX XXXX
> etc...)
> I now want to get it to work with my area code. but I cant seem to get
> this to work :(

Okay, I have got it now!!

For anyone else who is doing this,
I have the following in my Outboaund Routing -> VoIPBuster -> Dial Pattern
0|Z.
6.
7.
8.

In the Trunks -> VoIPBuster -> Dial Rules I have the following
0044+XXXXXXXXXX
00441689+XXXXXX

From a phone conencted to the Asterisk box, I can now dial an 01 or 02
number wihout prefixing, Asterisk then inserts 0044 then removes the first 0
of the dialed number.

I can dial any local number starting with 6, 7 or 8 followed by 5 numbers,
it will then add 00441689 in front automaticlly.

Sparks...