Is one of my cats visiting you? Florence Rd /Lancaster Rd

One of my cats (tabby and white on the left of the photo below) seems to stay out for longer and longer than usual and coming home smelling different (some perfume/e cigarette perfumed smell?) so wondering if he is vising someone in the neighbourhood? 

It is the tabby and white one on the attached photo I wonder about so if he does come to visit (and possibly beg for food as he is a greedy monster) - please do not encourage, do not feed. He is 8 years old and I got him as a kitten, he has a home, he is neutered and micro chipped and well fed. He also costs me arm and leg in vet fees.. sighhhh.

Please do let me know if you live in the area and notice him visiting someone - I am talking Florence or Lancaster Roads in N4...

Thanks a lot.