In September 2007 he was loaned to League One side Luton Town on a three-month loan deal.
He was recalled from Luton in October, due to an injury to Paul Robinson.
However, on 7 January 2008, Alnwick joined Leicester City on loan until the end of the season.

Alnwick made his league debut in an M69 Derby on 12 January, keeping a clean sheet as Leicester won 2–0 at the Walkers Stadium.
He kept four clean sheets in eight league games, conceding six goals before suffering a thigh injury as Leicester were relegated from the Championship.

On 16 October 2008, Alnwick joined League One side Carlisle United on an initial one-month loan deal and was recalled by Tottenham after the one-month loan ended to become another serious option for the first team goal-keeper position.
In September 2007 he was loaned to League One side Luton Town on a three-month loan deal. He was recalled from Luton in October, due to an injury to Paul Robinson. However, on 7 January 2008, Alnwick joined Leicester City on loan until the end of the season.
Alnwick made his league debut in an M69 Derby on 12 January, keeping a clean sheet as Leicester won 2–0 at the Walkers Stadium. He kept four clean sheets in eight league games, conceding six goals before suffering a thigh injury as Leicester were relegated from the Championship.
On 16 October 2008, Alnwick joined League One side Carlisle United on an initial one-month loan deal and was recalled by Tottenham after the one-month loan ended to become another serious option for the first team goal-keeper position.
Ben Alnwick