Thanks for all your kind comments and helpful advice. I have used Microsol/set in the past, Darby, with good results on gloss surfaces. However I feel that glossing a neatly painted matt surface and then matting it again makes the original colours significantly darker and frequently the matt varnish ends up a milky white. I used Decalfix for the first, and so far, only time after watching a short video online, imaginatively titled 'How To Use Decalfix',Which shows the use of this to soak the decal from the backing and applying to the surface which has also had decalfix brushed lightly on. The claim is that this avoids silvering without the need for applying to a gloss surface, and those which I did manage to apply seem to bear this out. I didn't manage to get the lost one in the right place and shifting it about eventually destroyed it, Airfix are unable to replace these unfortunately. I have seen the white outline version Pete610 but unless you know a miniature sign writer it will have to stay missing.