2 x tix to see The Prodigy at Brixton Academy 20th Dec - Would Like to Swap for 19th Dec ?

Hey! I have 2 x tix to the sold out Prodigy gig at Brixton Academy on Thurs 20th Dec. Would ideally like to swap them for the previous night on the 19th but am also taking offers for sale. Face value is £50. Thanks, Rich