I use Holts Duplicolor for all my vintage restorations. Its a fine spray automotive lacquer with a volatile fast drying solvent and excellent adhesion and it comes in a myriad color/shade variants and in small aerosol spray cans and its usually possible to find a near exact colour match. It also does not obscure underlying surface textures if they are there. Scroll through the charts in this link:
http://paintcolorselector.com/dupli-...int-chart-pdf/
These small spray cans are readily available in AU, I'm not sure about the UK, so you might have to order them in.