Sorry to hear that, and sorry generally as thefts in BS7 seemed a bit less regular of late...
I've taken to feeding my chains through the bike frames and fork arches to maybe deter this type of theft, but then again, if someone goes to the trouble of trashing a uPVC door then they will probably take what they can get and destroy the rest. But at least you might keep your forks? I might start locking wheels separately too, but you can only go so far before you cant be @rsed to unlock the whole lot and go and ride yourself.
BTW - does anyone in Bristol have an update from that officer that was designated to investigate bike theft? Does he have a way of combatting the cunning use of hoodies and gloves yet...?!