Re: The sound you hear are the snorring pigs
No explicit connection, however in 2007 the EU said:
"Any Member State deciding to withdraw from the Convention and therefore no longer bound to comply with it or to respect its enforcement procedures could, in certain circumstances, raise concern as regards the effective protection of fundamental rights by its authorities. Such a situation, which the Commission hopes will remain purely hypothetical, would need to be examined under Articles 6 and 7 of the Treaty on European Union."
Respect for human rights is a precondition of membership, respecting the EHCR is the most convenient way to demonstrate it. So the UK would be on unstable ground re EU membership if it rejected the EHCR, especially in the light of the snoopers charter and general right wing disrespect for human rights currently taking hold.
But you're leaving anyway lead by extreme right wingers so human rights aren't likely to play a big part in the future of England or their holiday homes in Wales.