There are two possible colour schemes. One is Dark Sea Grey and Dark Green over Light Aircraft Grey, the other is Hemp over Light Aircraft Grey. All these colours are available in the Humbrol enamel and acrylic ranges, the Xtracolor enamel and Xtracrylix acrylic ranges, and hte White Ensign Colourcoats enamel range. There are also matches for these colours in the Gunze range.
However, since Tamiya have only once featured a modern RAF aircraft in their range (the 1/48 Harrier GR.1, back in the 1970s), they don’t have deliberate matches for these colours in their range. that said, my research suggests the following:
Dark Sea Grey: XF-53
Dark Green: XF-13 or AS-09
Light Aircraft Grey: no match in the Tamiya range
Hemp: no match in the Tamiya range.
Having just looked at XF-53 and XF-13 in my paint racks, and compared them to the relevant BS318c colour chips (the British equivalent of the FS595 colour fan) I’m not overwhelmingly convinced that these are especially close matches either.
I would strongly suggest that you use one of the above ranges instead. In Humbrol, the colours you need are Hu.163, 164, 166 and 168. These are available in the Humbrol acrylic range, which should be readily available in Scotland, thin well with Halfords economy screenwash, and have the advantage over Tamiya acrylics of being brush-paintable.
White Ensign Colourcoats are a quality product too, and have the advantage over Zrtacolor/ Xtracrylix in that they are brush-paintable, if you thin them slightly, and that, unlike Hannants, White Ensign don’t require you to buy a kit at the same time as you order paint.
Cheers,
Chris.