Thanks for the replies
re the photos I am struggling to condense / resize them to be able to post on this forum (I will try to get someone under 20 to help me with technology) in the meantime the following link shows the same model of accumulator trailer/trolley I have :-
https://commons.wikimedia.org/wiki/File:Accumulator_trolley,_Royal_Air_Force_Museum,_Hendon._(23169500074).jpg
mine is currently sporting a lighter shade of blue colour than the image above
re the colour scheme, am I barking up the wrong tree with olive drab ? the post on this forum for RAF vehicle camouflage colours suggests that in late war yellow could have been used ?
Re the tyres I have been able to look more closely at the (perished) tyres and have discovered a size of 5.00 x 19" printed in a much smaller font than the 29 x 5 - if that is the correct size then Vintage tyres may have some in stock.
Any advice of restoring the canvas over wooden framework would be welcomed (I am thinking along the lines of whether anyone can give advice having restored a bow top caravan - whether canvas needs to be stretched / prepared / doped ??)