Corportion Tax Losses Query

Hi all,

I'm sure this is all pretty simple but the old grey matter does not work well at this time of night!

YE 2007 Tax Calcs:

Trading losses £3277 - Utilized £1 2007 & £3276 carried back, losses carried forward = NIL
Corporation tax debtor as at 207 year end £622.44

YE 2008:

Profits approx £35k (pending final few "bits and pieces" from client)
Corp Tax Charge for year £7175 (50% profits @ 20% & 50% @ 21%)

What I can't get my head around for love nor money this evening is what happens in 2008 to the £622.44 corporation tax debtor brought forward - in terms of accounts & tax return.

Any help greatly appreciated!

Louise