In times of crisis you can always call the following numbers:

MIND 03001021234  open: 9am-6pm Monday to Friday

Samaritans 116123 open 24/7

Shout is a sms line. Text SHOUT to 852258

Papyrus is for under 35 years of age. 08000684141 open 24/7 or sms 07786209697

Your local crisis team/ CMHT this contact varies from region to region as do opening times

NHS 111 option 2 for mental health crisis

And for emergencies you should always contact 999.