Towell is already in the first team squad.
Not sure there are going to be any stepping into the senior squad this summer, although there will no longer be 93 day loans available.
Tilley
I've watched a lot of the Development squad this season and the only two who really impressed me were James Tilley and Jayson Mulumby (when he's played). The later looks like being a hell of a player.
That said, AZ Gull is probably the one to ask on the subject.
Yep. JT. Definitely the closest we have to being ready. Rob Hunt. Molumby perhaps (if you're good enough yada yada)
Through Irish family, I know a lad who has just signed a 2.5 year deal at Saints. He has played through the age groups with Molumby, and the other Irish lads at the Albion (Byrne, Mandriou, etc). I asked him about Molumby and he rates him very, very highly. 'Never stops', 'works SO hard', etc