I reset the router …Took me some time to understand how to do it because on resetting , the SSID and other properties went to default and had to set up the network all over again . I am using an old TPLINK Router.
Not sure if the problem has gone away . I will try for a day and will update you tomorrow.
Is there any script etc you would like me to run. Any advice on how to protect the router maybe

Regards
N