I've looked into your enquiry for you and found that we have an Express store opening on February 19th 2009 named Kensal Rise London Express.
As our store is yet to open I don't have full address details to check if it will be located on Chamberlayne Road however I can advise that the postcode should be BR5 1HD.
The postcode, of course, is not in Kensal Rise. In fact it's in Orpington. Hence my question mark. But I don't see any reason why there would be a store in Orpington called 'Kensal Rise London Express' and so I assume the postcode has been given wrongly.