BNPS.co.uk (01202 558833)
This £12,000 artwork shows the RMS Olympic with the Titanic in the background.
An incredibly rare travel poster advertising trips on the Titanic has been discovered on the back of painting that has been hidden behind a false wall for 100 years.
A couple renovating their Victorian home in Wales stumbled upon the lithographic poster after knocking through a stud wall in their living room.
It is being sold for £3,000 along with two other vintage promotional posters for the ill-fated liner at auction in Wiltshire.