Well yeah, my version of security is that I already have enough equity to sell up, downsize and be mortgage free elsewhere in the UK.And if you've got the salary to pay for it and it's not a burden, why not.
Its an appreciating asset as well. (probably!)
All that said I am not immune to the madness that the cheapest house (not flat/stuiod or maisonette) within 5 miles of me is over £200k