Ancestry UK are offering free access to all their UK & Ireland records from tomorrow Friday until midnight Sunday.

see http://www.ancestry.co.uk/cs/free-access

This appears to be another genuine offer without strings attached. You will need to sign-up by email but nothing else should be necessary and certainly no payment should be asked-for. By signing-up you'll receive occasional email newsletters but in my experience no spam, some of the newsletters give notice of useful offers such as this.

Happy Hunting, Jeff.