Broken down; place your bets

[Niall]

check in the open hole for goodies stuck in the flywheel
wind the engine backwords you might find a bolt drop out the housing

tried; still locked, it physically won;t turn by hand or by starter; tried taking the starter off incase something were wedged here, nope.

Its 'wedged'? How the hell does a gear box wedge? Tried jacking it up at the front and turning the wheels with the car in neutral?

oui; the wheels turn but no gear/fly ofcourse as it's not engaged to a gear

put the clutch in and try to manualy turn the engine over

tried; also tried rolling the car and dumping the clutch in first to try and chuck it free that way, nothing; literally hit a brick wall of force

Has it got a quickshift on it? If so, my money is on jammed syncro.