I was after a pair of Schwalbe CX Comp tyres, but my usual online emporium (CRC) were out of stock, so I ordered them from Winstanleys instead. After they accepted the order, it turned out they only actually had one in stock, so they sent me that and put the second on back-order for me.
Two months and several “we’re still waiting for stock from our supplier” emails later, I cancelled the order and bought one from CRC, who by then had been showing them in stock again for a couple of weeks.
OK, possibly / probably not Winstanleys fault as such, but I’d suggest they need to find a different supplier, or chase them up a bit more vigorously!