site redirecting when loggin into wp-admin

I have two wordpress installs, both hosted on by the same hosting company but on different domains.

1 = https://www.example1.co.uk/wpfolder
2 = https://www.example2.co.uk/

When I log into https://www.example1.co.uk/wpfolder I see the correct wordpress site, but when I add wp-admin to the end to log into the administration to edit the site, something is automatically redirecting me to https://www.example2.co.uk/wp-admin

I guess I have inadvertently caused this, but cannot figure out what I’ve done. I created my wordpress site at https://www.example1.co.uk/wpfolder to start off with and then when I was happy with it I got my hosts move a copy of it and it’s database to the https://www.example2.co.uk location.

The one thing I did do, was to delete the wp-config file on the https://www.example2.co.uk wordpress install in order for wordpress to prompt me to create a new one and associate it with the new database path.

Any help / suggestions very gratefully received.

Thanks