Do you recognise this man?

At 5.40pm on Wednesday December 23, 2015 a woman used the self-service checkout at Asda in Goole and requests £50 cashback. The woman left the store with her purchases but left behind her cashback.
A man then approached the self-service checkout and removed the £50 belonging to the woman.
Officers have released a CCTV still of a man they would like to speak in connection with theft.
If anyone believes they recognise the man, please contact Humberside Police, on 101 quoting crime reference number CJ/2159253/2015.