No with the possible exception of "heritage" home improvements I think. However interest on loans raised to fund such renovations does qualify for owner occupier mortgage interest relief up to the usual FTB/non FTB limits.
Cost of enhancements such as extensions or the rising damp repair, if the problem existed at the time of purchase would be deductable if the house ceased to be your PPR and & if you were liable to CGT.
Also, interest on loans to finance this kind of work may be tax-deductable, if you're not over your limit.