From the Royal Society of Chemistry:
Dear Colleague
Due to the upgrade of the Royal Society of Chemistry Internet link there will be intermittent interruptions to our Internet connectivity during 9am-5pm (UK time) on Tuesday 27 January.
I am afraid that the engineers involved in the upgrade can not give us any firm information about when connectivity to the RSC web site will be affected, although the interruption to RSC web site access will be kept to a minimum.