VPN using overseas

I could watch ITVX and BBC Iplayer using the London VPN when overseas. NOw they no longer accept Avast VPN as being in the UK, none of the 3 platforms, Wonderland, Glasgow or London work anymore ? Please help.

The BBC is notorious on blocking VPNs how they do it is beyond me.

So I googled part of the above to search - https://www.google.co.uk/search?q=BBC+is+notorious+on+blocking+VPNs+how+they+do+it

Upon noticing that many different devices are using the same IP address to connect, BBC iPlayer suspects VPN or proxy usage and blocks access. It also checks if the IP address is associated with VPNs, and if it is, the platform blocks it as well.

So this may be the problem.