The defret will destroy the value of the instrument, and for a BBNE2 this is probably somewhere between 2 and 3 grand.
Nathan East plays a TRB5 fretless, not sure if it's a defret or a factory custom special. Prices of these are starting to creep up and amounts verging on silly money are being asked for them. If it were me I'd be looking for a TRB5, BB-N5A or the fretted version BB-N5 to defret. Or maybe even a BB2005.
Luthiers in Suffolk? Well you could ask Andrew Guyton but I'd be surprised if he'd be interested. I'd say Colin Fulton, but he's disappeared from view and I don't have an address. It depends whether you want a full-on luthier or a good guitar tech. Steve at Guitar Lodge in Felixstowe has done some good work for me, though nothing involving fretwork or fret removal. He does a lot of fret work and broken headstocks though. Robbie Gladwell is also highly recommended though I've not used him so cant vouch for him personally.
If you're going to attempt it yourself, buy some cheap necks and practice.