Update - not that it really matters...
Went outside and London followed me on the balcony and started rolling around in the sun when I noticed that
his belly was shaved. I thought
he was quite delicate for a 2 y.o. male.
A quick look at
his papers quickly confirmed that London is a
she - the odd thing being that the NSPCA web site gives the description "neutered boy" and all the employees referred to her as
he.
Love her all the same. And I guess it'll spare us the possible issues of having two male cats (even neutered) in the same house.