London's Tower bridge: Vintage Image

Never before seen photograph of the construction of Tower Bridge being constructed have been unveiled after a stash of hundred-year-old photos were found in a skip.

The 50 sepia pictures, dating back to 1892, reveal in incredible detail the ingenuity behind one of the capital's most popular tourist destinations.

The discarded pictures, which were retrieved by a caretaker who was looking after a building being turned into flats in 2006, have spent the last five years in a carrier bag underneath his bed.

The 59-year-old, who wishes to remain anonymous, said that after the occupants of the Westminster office building moved out, the album and a number of documents were thrown into a skip outside.

He said: "I took the ledgers to the Tower Bridge Museum because I thought they might have some historical value. I told the man at the museum that I had also found some photos but he told me they already had plenty of those.

I didnt know what to do with them so I wrapped them in some brown paper and put them in a bag under the bed." We will have a gallery of the images on the Telegraph site later today.

Picture: David Willoughby / Barcroft Media