Past Cheaney made shoes for Gieves & Hawkes until a/w 2010
Shoes: Who makes what for whom. - Page 7
Definitely Loake, fonts , last, and broguering design are visibly Loake.
The shoe seems to be a rebranded Loake Strand, maybe made to higher standards.
Purdey has some boots and a couple of shoes made for them by Crockett & Jones.
I particularly like their version of the Coniston, which comes in a darker brown than the standard C&J varieties, and the grain leather brogue boot they seem to have based on the Islay (but which is on the much more becoming 325 last). More detailed discussion, plus pictures, can be found in this thread:
Unfortunately, their prices look like they've just been raised pretty recently. Still not a terrible deal for either model, though.
Also, if memory serves, Paul Stuart has shoes made for them by Alfred Sargent, Cheaney, and Sanders.
The Sargents are really nice-- made approximately to their Exclusive standards, but a little less pricey. 724 last, mainly. Good value, especially when on sale. .
Cheaney makes a version of what looks like their "Irvine" model for PS, which is a chunky, Commando-soled two-tone boot lined at least partially with shearling.
Sanders appears to have allowed PS to rebrand their crepe-soled dirty buck ("Archie"). Wish they'd send over the red brick version ("Jack"), too.
Aside from those brands, some people seem to think Carmina is behind PS's Spanish-made shoes, but I'm not sure how true that is.
Anyone know/care to elucidate?