> I would be quite surprised if this has actually ever happened.
Per the BBC/Capita own data available via FOI [0] (though not without them dragging their feet and making a simple process a protracted one... not to mention they tried to withdraw the documents provided [1]), in FY 2014/2015 there were 351 enforcement requests made for all of UK, the Capita/TVL Legal made 256 applications to court for a warrant, 167 of those were granted and 115 were actually executed after being granted.
If they think they have grounds they will absolutely try to get the warrant - and note that there is a disparity between what the "commercial" arm of the enforcement thinks they can push on (351) and what the court system thinks is actually suffcient (167).
That count does not include the times where Capita/TVL managed to get enough without going that fair (the 170k cases they managed to get without warranted visits, for instance).
[0] http://tv-licensing.blogspot.co.uk/2016/07/bbc-releases-tv-l... [1] https://www.whatdotheyknow.com/request/monthly_performance_p...