OK I have been able to access the appliances following this http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&docTypeID=DT_KB_1_1&externalId=2003890
Pining the VSA Cluster IP from either of the appliances times out. I can ping the VSA Cluster Service IP which I have noticed in my vCenter server. I have also tried to recover the cluster following this vSphere Documentation Cente but this fails saying that it can't connect with the Cluster IP. It looks as though the assignment of the Cluster IP is the issue. I don't know why disconnecting the nodes from the switch for 1 minute would cause all this? How can I assign the Cluster IP manually to a node? Can anybody help?