Milsurps is right! The tube of the No22 IS 2" but on both ours (UKmade and not C-REL), it's only 1" at the brass ends while the centre steel section is noticeable narrower so the telescope bracket and cradle wouldn't grip it.
Don't forget Vintage Hunter, that re-barrelling a T isn't quite as straightforwards as a normal No4 because the new No4T barrell has got to collimate EXACTLY with the telescope both on the wall chart AND on the 25yard range AND when the sniper zeroes it in at 400 yards. That's why when we rebarrelled a T, we started the job with about 20 new barrels and took the barrel that aligned the closest, breeched up that one and then set about collimating the telescope to the axis of the tube THEN and on and on and on. As I said, not the job if you wanted to get away early in the afternoon!