Sunday 12:45 options
1) supporters coaches
2) drive, a 7am departure on a Sunday morning plenty of time
3) national express coach from M.I.A at 00:45 arriving Pompey at 10:00 via a change in London (£20.90) coupled with the 17:22 train back from Fratton to Stockport via Southampton (£61.95)
4) national express coach from M.I.A at 00:45 to London Victoria coach station arriving 6am (£12) then 7:51 London Waterloo to Portsmouth arriving 10:13 (£15) coupled with the 17:22 fratton to Stockport via Southampton train (£61.95)
5) megabus coach from M.I.A at 03:25 to London Victoria arriving 08:30 (£7.40) then 8:54 London Waterloo to Portsmouth arriving 11:13 (£9) coupled with fratton to Stockport train mention above
6) either of the above options coupled with 18:35 Flybe flight from Southampton to Manchester arriving 19:40 (£80)
7) travel by train on Saturday use a hotel and return Sunday, can be done for under £80 using one of the many ticket splitting websites