There are a number of local support services you can access in Hampshire, Surrey and West Sussex. Also see the 'Counselling services' section.
Hampshire
Hampshire children's services (if you or someone under 18 you know is struggling at home from violence, emotional abuse, alcohol issues etc): call 0800 555 1373 (24/7). In an emergency where someone's life is in danger, call 999. https://www.hants.gov.uk/socialcareandhealth/childrenandfamilies/contacts
https://www.easthantsmind.org/wellbeing-services/childrens-mental-health-and-wellbeing/ (up to 18yrs)
https://hampshirecamhs.nhs.uk/ and https://hampshirecamhs.nhs.uk/campaigns/the-ice-project/ (up to 18yrs)
https://www.southernhealth.nhs.uk/our-services/a-z-list-of-services/early-intervention-psychosis-service (NHS advice and support if worried about psychosis, for 14yrs+)
https://www.solentmind.org.uk/support-for-you/our-services/ (18+)
Bordon and Petersfield Community Mental Health Service (18+): 023 823 10200
Surrey
Surrey children's services (if you or someone under 18 you know is struggling at home from violence, emotional abuse, alcohol issues etc): see phone and email contacts on https://www.surreycc.gov.uk/children/contact-childrens-services In an emergency where someone's life is in danger, call 999.
https://www.mindworks-surrey.org/ (up to 18yrs)
https://www.sabp.nhs.uk/our-services/advice-guidance/getting-help-crisis (CAMHS community team contacts if you’re already within CAMHS or are on the waiting list)
https://www.sabp.nhs.uk/our-services/mental-health/community-services (18+)
https://greenhub.org.uk/ (social and therapeutic horticulture project for teens near Godalming)
Sussex
Sussex children's services (if you or someone under 18 you know is struggling at home from violence, emotional abuse, alcohol issues etc): https://www.westsussex.gov.uk/education-children-and-families/keeping-children-safe/im-a-child-or-young-person/ In an emergency where someone's life is in danger, call 999
https://sussexcamhs.nhs.uk/help-support/ (up to 18yrs)
https://www.sussexpartnership.nhs.uk/service-adult-community-mental-health-teams (18+)
https://www.sussexpartnership.nhs.uk/your-mental-health/getting-help/mental-health-resources (18+)