The Black and Whites full-back, who scored the winning try in their Challenge Cup final win at Wembley last August, links up with the England elite performance squad in Rochdale today.
Uncapped Shaul is part of a 31-strong party that will meet for training under assistants Paul Anderson and Paul Sculthorpe as the national side starts preparations for the World Cup.
The 24-year-old, joined by Hull team-mates Scott Taylor and Danny Houghton, said: “I’m looking forward to it and I’ve never been involved in anything to do with England coming up through the ranks.
“It will be good to get around the boys and see what that brings.
“Hopefully the experience will make me better as a player.”
Hull lost 16-14 at home to Catalans last Thursday, ill-discipline proving their downfall with Luke Walsh kicking five penalties, his last in the 64th minute giving the French side victory.
“It was very frustrating and disappointing for us,” said Shaul, whose exploits last term saw him gain recognition in the Dream Team.
“It’s two points we’ll look back on and say we should have took.
“We only have ourselves to blame to be honest.
“We gave away too many penalties and errors from the same players; you can’t afford to do that at this level.
“Catalans just controlled the game a lot better than us.”
That was especially so when the visitors’ Greg Bird was sin-binned in the first half - and they actually went ahead during his absence.
“We went into panic mode when they went down to 12 men,” added Shaul.
“We just had to keep to the gameplan and grind our sets out.
“The penalty count was very frustrating but I can’t say too much or else I’ll end up getting fined or something.”
Hull are in action at Huddersfield on Thursday who picked up their second win of the season with a tight victory over Wakefield on Friday.
Shaul added: “Huddersfield are a good outfit and on their day they can beat anyone.
“They have key men like Danny Brough who we have to stop.
“It’s going to be another test but it’s one that we’re looking forward to.”