Money expert Martin Lewis has tipped off bank customers of major banks like Halifax, Santander and Natwest about £550 of bank switching cash on offer to people willing to ditch and switch to three other firms.

Martin told his followers how Barclays is offering a free £175 in a ‘rare’ move for the bank which doesn’t normally hand out cash incentives like other banks do.

And First Direct is offering £200, £175 in cash with a £25 Amazon voucher on top, while Club Lloyds is also…