blamire

Sorry if this is a stupid question but I noticed foggy wears a royal engineer cap badge? (I’m rewatching the episode the great boarding house caper, literally one of my fav episodes) and I think blamire sometimes wore some badges, does anyone know what they’re for? I’m guessing it’s something...

Apologies if this has already been asked but I was curious to see who people’s favourite characters from LOTSW was! And why if possible? Mines blamire (though I do love a lot of characters, it is hard to pin them down to one..especially when the show’s era’s have their own different “flavours”...