In reply to Kat93:
Yeah, take a hat and gloves. Assuming it’s a kinda nice day and you set out in a t-shirt, you really do still need to be taking some warm clothes (water proof jacket and fleece). If you are lucky they’ll stay in your bag but more often than not you’ll be glad of them. Going up will likely be pretty sweaty so cotton t-shirts will likely become saturated which will chill you to the bone once you reach the top and the wind hits you. If you don’t have a “wicking” man made fabric walking t-shirt, take an extra ordinary t-shirt to change into at the top.
Get orange survival bags. I mean you are never likely to need it but if god forbid you do manage to twist an ankle or something and become immobile, it will take hours for rescue to come and you’ll get very cold waiting.
If it is foggy on the top (it often is) and you get disoriented, don’t assume everyone is going the same way you want to go i.e. don’t start randomly following other people. Ask for help with directions if you become unsure of your own navigation.
Remember to snack on the way up. It very possible to run out of energy and “hit the wall” like marathon runners if you don’t.
Post edited at 12:24