Because Surrey is home to Little India and because of intense pressures to conform within the EI community, I doubt you'll find an EI SW peddling her wares. There's too much chance that someone else within the EI community would recognize them and tip off the SW's family/friends, in the end resulting in shame on her and her family.
I know it sounds pretty strange to someone "outside the realm", but we are talking about the dynamics of a different ethnicity and religion. Women are not viewed very highly to begin with. Considering some of the crazy stories you hear of the man and his family controlling/abusing/murdering the wife, being an EI SW in Surrey is very dangerous.
I know for a fact there are many EI SP's in Surrey, which is obviously much more discreet and allows the SP to screen clients. There's a much smaller chance of someone within the EI community "seeing" her behind closed doors versus in plain view on the street.
Just my $0.04 on my religion.
I hate many of these dynamics which are present, but nonetheless, they are there.
They lightly touched upon these dynamics in the movie "Bollywood Hollywood." Not quite to the extent to fully explain the normal EI way of thinking, but just enough.