yeah,
An ex girlfriend I knew had it done. Apparently they slice your jaw bone at 45 degrees and just take an equal chunk out from both sides. She ended up with two tiny hardly noticable scars from the drainage tubes. and that was it.
A referral by your dentist to an orthognathic team comprising of a maxillofacial surgeon and or an orthodontist may be required if it is quite marked.
Otherwise conventional non surgical oprthodontic treatment may be possible.
Yes, you can have an op (if needed). My neice has just had it done successfully - it is a big op, but quite common apparently. Ask your dentist (or doctor?) to refer you to a specialist surgeon. It can be done on the NHS.
My neice looks much better now she's had it done - no scars at all, and she's much more confident. Good luck. xxx