Quite straightforward but a reminder..
2 main methods Straight Line (Cost - RV) / UEL
Reducing Balance NBV x depreciation rate
The RV and UEL should be kept up to date each year
Any changes made prospectively (i.e. no changing of comparatives)
A change in depreciation policy is actually only a change in accounting estimate not policy
So again changes only made prospectively
On a revaluation - check that all accumulated depreciation on that asset has been cleared to zero
Non-current Assets - Depreciation Non-current Assets - Revaluation
Increase goes to OCI and RR
Basic double entry steps: Dr Accumulated depreciation
Cr Revaluation Reserve
Dr Cost
Cr Revaluation reserve