Site A logins work as they should. If members go to www.siteA.co.uk or siteA.co.uk then they are logged in and a cookie is stored.
Site B is giving me problems. when members go to www.siteB.co.uk they are logged in OK and the cookie is stored. If they go to siteB.co.uk (omitting the www) then they sign in and it appears to work. It thanks them for signing in but once returned to the front page they are not logged in and treated as guests.
Both sites have the cookie domain set to /
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