How many people have holiday homes in the UK?

This report by the GMB about the number of holiday homes says 173,276 Have Holiday Home In UK.

The GMB think : LOCAL COUNCILS NEED POWERS TO COMPULSORY PURCHASE UNDERUSED HOUSES AFTER CENSUS SHOWS 173,276 RESIDENTS HAVE HOLIDAY HOMES IN THE UK
A holiday home that is only used for a few weeks a year is very different to a holiday home that is occupied for most of the year in terms of its economic benefits to any locality says GMB