The Argus should not be too ashamed of mistaking a late mark Spitfire with the Battle of Britain machine. It happens all the time.

One way to spot the early marks is the yellow, blue, white and red roundels. These were the same width.

Later the yellow and white were much reduced in size.

The camouflage colours also changed from brown and green to two shades of grey at about the end of 1941, as far as I can remember.

The biggest gaffes are in the TV history programmes.

In one, featuring the Battle of Britain, a squadron of French Morane 406s were shown. Also four cannon Hurricanes.

There was a very small number of British fighters experimentally fitted with cannon at the time. Another programme showed an alleged attack on Dunkirk shipping which was actually a coastal convoy.

-RW Carden, Brighton