Vintage stamp album with red leather cover

Yesterday around 2:15pm I misplaced my vintage stamp collection album outside the Bluewater Shopping Centre in Greenhithe, Kent. It's a burgundy-red leather-bound book about 12 inches tall and 9 inches wide, with a brass clasp that sticks and a small green sticker on the back stamped 'BR-23'. Inside are stamps from the 1930s to 1960s, including a few Canadian issues and a handful of Commonwealth sets. This collection has sentimental value; it was a gift from my late grandfather and I really need it back.