Counselling 
Under 'Some useful organisations and services' below you'll find organisations offering general counselling. The sub-categories list links to organisations offering counselling for particular problems or groups of people.
Sub-categories 
Bereavement
Domestic Violence / Sexual Assault / Abuse
Drugs / Alcohol
Families, Children & Young People
Gay, Lesbian, Bisexual, Transgender
Minority Ethnic Groups
Refugees / Survivors of Torture
Relationships
Victims of Crime
Women
Some useful organisations and services 
Albany Trust
Target Group(s)   Anybody with psychosexual or relationship problems, including anxiety in relationships, bereavement and feelings of low self-worth.
Area Served   London. Also southeast England.
Centre 70 Counselling Service
Target Group(s)   People on low income who are vulnerable or isolated or experiencing emotional difficulties or mental health problems.
Area Served   London.
Copleston Centre
Target Group(s)   Everyone.
Area Served   South London.
Drop-in Listening at Chatsworth
Target Group(s)   People experiencing any kind of difficulties in their lives.
Area Served   Lambeth.
Help Counselling Centre
Target Group(s)   Anyone aged 18 or above.
Area Served   London.
KCC Foundation
Target Group(s)   Individuals, couples, families.
Area Served   UK.
Metanoia Counselling and Psychotherapy Service
Target Group(s)   People looking for humanistic or integrative therapy or counselling.
Area Served   London.
Relate
Target Group(s)   People experiencing difficulties in their relationships, whether married, single, living together, in a same-sex relationship, separated or divorced, also parents.
Area Served   England, Scotland, Wales and Northern Ireland.
Samaritans - Central London Branch
Target Group(s)   Anybody needing emotional support and/or going through a crisis or feeling suicidal. Anyone supporting or worried about someone in a crisis or feeling suicidal.
Area Served   Central London.
The Caravan Drop-in and Counselling Service
Target Group(s)   General public.
Area Served   All London.
The Minster Centre
Target Group(s)   People experiencing emotional difficulties, excluding those with current alcohol or drug misuse problems.
Area Served   London.
The Tavistock Centre for Couple Relationships
Target Group(s)   Adults with relationship problems.
Area Served   London.
Wandsworth Association of Psychotherapists
Target Group(s)   Anyone who feels they could benefit from counselling/psychotherapy. Low cost services targeted at people on low incomes.
Area Served   Wandsworth and surrounding areas.
Waterloo Community Counselling
Target Group(s)   Anyone seeking counselling, particularly those who are low-waged or unemployed.
Area Served   London, particularly people living or working in Lambeth and Southwark.
WPF Therapy (Westminster Pastoral Foundation)
Target Group(s)   General public. Also specialist services for disabled people and people with serious physical illness. Not for people with drug and alcohol problems.
Area Served   London.