It is believed to have been taken between 12 noon on Thursday 25th November and 8am on Friday, 26th November.

The oil painting, a portrait of Ada Lovelace, is surrounded by a gold effect painted wooden frame and is valued at almost a thousand pounds.

Anyone with any information about this incident, or who has any knowledge of where the painting may now be, should contact PC 3269 Scott Redford on 0300 300 9999 ext 806 3641.