Most government email addresses are of the form:
name@organisation.gsi.gov.uk
So try:
anne {dot} seex {at} lgo {dot} gsi {dot} gov {dot} uk
However, a Google of the first few digits (see
here) reveals some general @lgo.org.uk email addresses, so you could try anne {dot} seex {at} lgo {dot} org {dot} uk
As for a direct number, if they won't put you through then all I can suggest is that you call through their numbers out of hours. Start at 01904 380200, 201 etc.