After the First Test against Pakistan, he returned to the self we'd known 1993-1998 for the last six Tests that summer. As I said, though, he certainly still bowled well on occasions, even that very summer. The frustrating thing was that we all knew he could be doing much better.
Never better was this demonstrated than the NZ tour of 2001/02. He was England's best bowler, but he could easily have taken 30 wickets in 3 Tests, the rest of the attack was so poor. He didn't.
He bowled poorly in the first-innings of the SL series, then OK in the short second-innings. He then bowled superbly, absolutely superbly, in the Second Test, and his figures did not remotely do him justice. He was injured for the next 3 games and was brought back too soon. Was easily the best of a poor attack in the last Test against India.
Bowled poorly for much of The Ashes 2002/03, on mostly flat pitches on which he never offered much threat all career. Then got a ten-for in the last game.
As I said - this is still far, far better than Anderson and Harmison ever did for all their careers bar Harmison's first 7 in 2004. And this is when Caddick was not at his best.