I've found a post on their facebook page from May saying that they've moved from the High Street, Eton store to a new store in High Wycombe. So maybe this one still has the branding but is actually closed?
https://www.facebook.com/WindsorandEtonBrides/posts/pfbid0E4iGDx4sWrFbUSj79Gm5JKKhZjxLUVj3ypdxE3eGkk81qrUqs94JDyWib3DoajqAl