Yay! I can now access the archive again! Don't know exactly what the problem was, but it appeared to be somewhere between my ISP and the site (although it was obviously not the site itself). I was about to ring my ISP and get them to sort it but maybe someone somewhere else connected via the same ISP was having similar problems and they got it sorted first.
Many thanks to everyone for your prompt responses to my messages and for your help and suggestions. Much appreciated!
Elizabeth
