Hi guys as the title says. The centre rear seat belt mechanism has totally locked up. Locked up so tight you'd hardly get your fingers in behind the belt. Dropping the back seat gives me a little play but the mechanism is locked up. Im trying to figure out how to access the mechanism. Its in the middle of the back seat. Does the seat back come off? If yes how do I take it off? Seems to be all sewn up around the edges. Any help much appreciated

The mechanisms can get sticky if not regularly used. It sounds like the recoil mechanism has got stuck, a very light tap with a dead blow hammer to the mechanism might release it. If that works, then a light application of silicon spray onto the mechanism (keep it away from the belt) should keep it free. Failing that, a new mechanism is probably required.