I have come across a new vacancies portal ( well new to me anyway), on the Business and Human Rights Resource Centre's website. The organisation exists to advance human rights in business, they track over 5600 companies, and help the vulnerable eradicate abuse. Their vacancy page advertises internships and permanent vacancies broadly related to human rights both in the UK and overseas. Current Uk based vacancies that look interesting include:
Business Development Volunteer - Action Aid (2/3 day a week internship)
Project officer x2 Impactt ( Human Rights Consultancy)
Policy Adviser - Action Aid
Internship - Corporate Citizen
Campaigns Officer - World Development Movement
All are listed here. You can sign up for a weekly vacancy bulleting too.