My wife uses an add-on Lee-Enfield No.4 muzzle brake. It simply pulls over the muzzle and straps on the bayonet lug. You hand tighten the screw and you're good to go. She uses them on her No.4(T)'s and finds a recoil reduction of at least 50%. She's able to shoot for hours without tiring and makes a day out more enjoyable, although I suppose technically it's cheating as compared to shooting them the way they were issued.
Put WTB ads on various milsurp boards and keep your eye on eBay for them...
(Click PIC to Enlarge)
Regards,
Doug
Very cool, as there is absolutely no modification to the rifle. Note to Smellie...you'll have flea bay competition from Plinker on this little gem.