Do we have any evidence (with the conservative CDC-approved Borrelia tests) that whole families can be infected within a short time frame of a year or so, each independently being bitten by a tick?
A quick Google check finds that John Caudwell's country home, where he and his family live most of the time, is
Broughton Hall, near Wetwood, Staffordshire. He bought this home 22 years ago. If you put "Wetwood, Staffordshire" into the
Big Tick Project UK Map, you find that it's not even high risk area for tick bites (it's medium risk).