Swap At The Drive In at O2 Brixton Academy Tuesday 28 Aug !

Hi, I just bought 2 tickets to the At The Drive In gig on Tuesday 28/08 at the O2 Brixton Academy. These are upstairs tickets (I assume they are seated) and I am looking to SWAP these for downstairs tickets (I am not looking to sell). So, if you have downstairs tickets, but would prefer a seat and a better overview, get in touch! Can meet anywhere in London. Thanks in advance. Gregory