This guidance summaries existing requirements in TPP21-09 Valuation of Physical Non-Current Assets at Fair Value (TPP 21-09) and TD 21-05 Valuation of Physical Non-Current Assets at Fair Value (TD 21-05), relating to management revaluations of property, plant and equipment, in those years where a full comprehensive valuation is not required. It also provides some practical tips on how to determine whether a revaluation is required and, if so, an appropriate approach to an interim revaluation.