At a very rough estimate if the team were to go by canal boat on inland waterways it would take around 36 hours. It's a tricky route because the Brighton area and the Liverpool area are on different canal networks that don't join anywhere, meaning some complex navigation either by sea at some point, or carrying the boat across land to find an appropriate river to join which might be great for team building but less good for being in peak physical condition to face Salah. Canoeing may be possible with fewer logistical challenges, though I'd probably allow 4 or 5 days for that, and it also might not be the optimal preparation for a premier league game.
I remember reading once though that Tesco (I think) uses canals still to transport some goods between depots in Liverpool and Manchester because it's so much quicker than road.
Isn't the speed limit on canals 4mph?