Thank you for your kind reply and kind offer. What I'll though do when I go sometime soon, is, if it hasn't opened when I get there, is take up your suggestion to pop round to the Horrocks hide for help.
It's very variable Ian, should be open by 9 by the staff but sometimes others open up. If you are coming especially, from a distance I could help or if it isn't open go to Frank Horrocks hide and see the lads in there