I'd agree with this ispreview report, one of my deciding factors was whether the house we bought could get Virgin Media or Full Fibre, ended up with both. I would not have considered to buy a house with just ADSL connectivity... https://www.ispreview.co.uk/index.php/2021/11/estate-agents-find-full-fibre-may-help-to-drive-uk-house-sales.html