Defence values of allied Inf in F40 strategy scn

[cavalry corps]

In the campaign with the strategy options no fix,Its all good but what about the allied infantry. The Belgians and French are 12 while the British are 10 , what gives? I do not know much about 1940 but the BEF performed better than either of these two for sure ... is it a mistake . Its not a stock scn and I cannot find any readme file talking about any changes ?

Cav