A suitcase containing gems worth £1million was stolen from a train travelling through Watford Junction.

At around 6.30pm on Wednesday, November 8, a 35-year-old jewellery dealer boarded the 7.03pm train service at Euston station to travel to Birmingham New Street – which goes through Watford.

He put his suitcase on a luggage rack but when the train arrived at Rugby he realised the bag was missing.

The bag contained high value gems including rubies, emeralds and sapphires, which are worth more than £1 million.

Officers would like to speak to the man shown in the CCTV images as he may have information which could help the investigation.

Detectives believe the suitcase was most likely stolen from the train before it left the station at Euston.

Investigating officer, Det Sgt Nick Thompson from British Transport Police, said: “I would like to speak to the man in the CCTV images about this extremely high value luggage theft.

“I’d also like to hear from anyone who was on board the train or at Euston station on Wednesday evening, who may have seen a man acting suspiciously. The suitcase was a large black suitcase and contained more than 40 gems such as rubies, emeralds and sapphires.”

If anyone has any information about the incident or recognises the man shown in the CCTV images, call British Transport Police on 0800 40 50 40 or text 61016, quoting reference number 529 8/11/17.