LONDON- British commercial property values posted the largest monthly increase in 15 years, up 2.4 percent in November, as the market's recovery accelerated after a two-year downturn, data showed on Monday.

The Investment Property Databank's (IPD) monthly index has now increased for four straight months, for a compounded growth of 5.4 percent since the market began ascending in August.

The benchmark data, used as the basis for UK's property derivatives market, also showed that rents, for office, retail and industrial properties, fell by 0.3 percent on average, the shallowest decline since October 2008. (Reporting by Daryl Loo; Editing by Andrew Macdonald) (See for the global service for real estate professionals from Reuters)