BT mobile sim only deal £5 p/m for 12 months - unlimited minutes / texts £60.00 existing customers (includes £30 amazon + £30.30 possible TCB)
So you can profit 30p potentially if you get both.
Just after I posted I went to order and TCB was giving £35.35 rather then £30.30. So you can potentially profit £5.35 across the year, but this will be ending saturday.
OP TCB took 5 days to track (ordered Friday afternoon, TCB tracked on Tuesday morning) but tracked higher at £50.50