Looks good Pete - I like the burnt rusty finish on the exhaust. One thing to me stands out as missing though - a unit tac sign. Should be on opposite front & rear fenders to the Union Jack; an example I can remember was 4/61 (1st Bn The Royal Welch Fusiliers, 20 Armd Bde, 4th Armd Div, BAOR 1980). It should be stencilled on in white paint. If the decal sheet doesn't supply these, I'd think Accy Armour would be your best bet.
Cheers Chris, yes I did think of a unit tac sign but have not found much in the way of pictures with them shown.