These types of endorsable codes come under 'MSXX' or 'PCXX' where 'XX' is a code. The point here, as already stated, is that this is a non-endorsable offence. It's the same as driving without a valid MOT. You receive a £60 fine but no points. Nothing is put on the licence therefore do not need to declare.

The OP should ignore the fixed penalty for the purposes of insurance.