Here are some images of Dave Porter's Tamiya 1/48 scale Supermarine Spitfire 1A and here in his own words is his description.
Here is a mark 1A Spitfire in 1/48 from Tamiya. The only modification was a resin seat. This Spit fought in the Battle of Britain with 910 squadron. The paint was a combination of Aeromaster and Tamiya.