I just saw the email. I think it's a good thing. I think WEX has a mix of customers, but I've felt that Calumet has always leant towards the professional side with the products it stocks and the fact that it does equipment rental.
I've been to both the small Soho store and the massive Euston store (where the rental stuff is) and even bought my 6D
second hand from them (a very good price, much lower than others). The Euston store is rather good for looking at stuff as it has enough space to have gear out, unlike some retailers with very small shops.
Worth noting that Calumet almost ceased to exist a couple of years ago, so perhaps this is a pre-emptive move to make sure that doesn't happen again.
Interesting to note from the store finder that Fixation is also part of the group.
No mention on the Calumet facebook page though curiously.
If they get the integration right, it'll be a great move.
I'd like it if you could stock check the store near you for an item and be able to either order for store-pick-up or at least get the website price in store. I hate it when stores do one price online and another in store.