hi peeps i managed to sort out the leak on drivers side i think [must wait for a downpour to check] but im right about the rectangular block of rubber at the front of the seal, it must sit on top of the window and the flat outer side of the seal must sit against the pointed rubber seal on top of the quarter light. to get this fit i removed the drivers roof seal rubber and also removedthe steel channel, then removed the gasket that sits between channel and roof [i found that this was too thick at the front and pushing the channel and front of seal too far away from roof] i also found a build up of dirt and crap had accumulated under the hood trim where the front of the seal screws into the hood frame, ive now cleaned it up fitted a new gasket[used a strip of waterproof self-amalgamating tape] and refixed channel but when refixing channel i moved the front of the channel nearer the edge of the roof [the screw hole in the channel are slotted to allow adjustment] then refitted seal, but at the front part i moved the block of rubber so that the screw goes directly into roof and not the the hole in the channel. now doing this got the front block of rubber sitting the same as the passenger side. then i adjusted the drivers roof locking handle so there are 2 threads showing below the lock nut i still got to check it at speed to make sure front hood seal is still good but its sh*tty out there at the mo . ali if your anywhere near enfield im quite happy to meet so you can compare seals
regards