UPDATE. My internet is still on and off and only reaching .49mps. I did not want the engineer in my home as I am elderly and am ''isolating'' at the moment.
I know that there is no fault in my home or on my property as I have had this recurring problem for years now. It has always gone back to 'normal' after a couple of days and no engineer has ever found a fault within my property. What am I meant to do now ? I have a new router coming and doubt that will make any difference. Openreach state that there are no outdoor problems and everything is good indoors. This is getting silly now.