Thanks, again gents -
Mike - I pre painted the wings then applied clear gloss as advised in instructions. Once dry, applied decals using a decal setting solution. When all lined up, pressed down firmly with damp tissue. I then went over decal surface with a decal softening solution - left for a minute or so then carefully brushed out the decal with soft, firm paint brush so that decal took on the contours of model surface. Finally, I applied several coats of semi matt clear coat. After a few hours, everything has 'pulled in' nice and tight onto model surface. I use this method for all models I build. NOTE: WNW do not recommend any decal setting/softening solutions in the instructions but I have never had any problems so far.
As regards trailing edge, I had already filled any slight gaps prior to painting. All I did after applying decals was to run flat of paint brush along this edge using a biege colour just so that no plastic was showing.
Regards
Dave