Revaluation-Swaps

Can anyone explain me how a revaluation of a Swap transaction occurs in accounting books. Assume transaction as Buy_Sell GBP/EUR 1.00Mn spot to 1 year forward swap and reporting currency as USD. First leg is spot and second leg is one year forward.Below rates are not actual rates.

GBP/EUR Spot 1.1900

GBP/EUR 1 year forward 2.0000

GBP/USD Spot 1.3100

EUR/GBP Spot 1.1000