Done it !! Got VERY peed off by water ingress into the engine compartment, so...Took the bonnet off, wiper arms, unscrewed the 2 piece plastic lower windscreen trim panel and eased it back far enough to get a bead of clear silicone along the inside edge of both halves ( and down the centre joint ). Put it all back together and I hope that that has stopped water bypassing the trim panel and running onto the engine.
Fingers crossed.
Fingers crossed.