There are several places to go for help.
Official army helpline
This confidential helpline is run by Combat Stress and is for soldiers, veterans, and families – for immediate mental health support. Open 24/7.
SSAFA Forces Line
This confidential helpline is independent of the army but run by people with military experience – for general advice and support. Open 9-5, Mon-Fri.
At Ease has no military connections at all. There’s no phone service but you can email or write in complete confidence, no matter what your situation.
Find other sources of support on the army’s site.