JIC and AN will work together, but not really recommended because of tolerances
the m25 and p1.5 is thread type, metric and imperial threads cannot be mixed
what is it your trying to sort out
this company does BSP to AN adaptors
Pegasus - BSP Female to AN Male Adapter
as do a few others...Think Automotive for example which are UK based but a little more expensive
Think Automotive Ltd On line shop