@Seanv1982 That's fair enough. As mentioned by @imjolly FTTP is available to you, you don't need to go for the 1000Mb connection as all 4 BT tiers are available via FTTP. You could retain your current package but get full 55Mb speed for the same price.
I found the problem. Called a very helpful bloke I’ve used before the Essex telephone engineer and he narrowed it down to the router. Found someone with a spare smart hub 6. Connected it up and it’s all working perfect now.
also took bt up on the fttp 500mb package l. Gets installed in 4 weeks. Should be interesting when it’s all set
thanks to both of you for your time