PPE - Revaluation of Freehold property

On 1 January 2010, Jerry Ltd bought freehold property for £800,000. This figure was made up of land £300,000 and buildings £500,000. The land was non-depreciable but it was decided to depreciate the buildings on the straight-line basis, assuming a useful life of 40 years and a residual value of £nil. On 1 January 2020, the land was revalued at £400,000 and the buildings were revalued at £450,000. The company decided to incorporate these valuations into its accounts. The previous estimates of the buildings' useful life and residual value remain unchanged. REQUIRED Write journal entries for the revaluation of Jerry Limited's freehold property on 1 January 2020. Also calculate the amount of depreciation which should be charged in relation to the buildings for the year to 31 December 2020. Can anyone help??????