On contacting the supplier, the advice I got was that they don't care if I pull the consumer fuse (to facilitate a re-wiring) but they'll need a cert. of conformity from a spark to replace the seals (fair enough).
However, the consumer fuse is not like one I've come across before.
A picture of the meter board can be found here:
Can anyone give any clues to the configuration?
All the consumer fuses I have seen have had a single seal. Also what is the black wire coming out of the top of the earth terminal likely to be?
I didn't post make a picture of the consumer unit available as I didn't want to scare anyone.