Forster won the account for the charitable company following a competitive pitch.
The agency will work to increase awareness of Local Trust and its ‘Big Local’ programme, which is funded by the Big Lottery Fund.
Part of Forster’s remit will be to promote Local Trust’s first evaluation of the programme, which provides 150 areas across England with the opportunity to make their local communities better places to live.
It will use media relations, stakeholder engagement and internal comms to encourage decision makers to consider new models of funding and supporting communities.
Peter Gilheany, PR director at Forster Communications, added: "Local Trust is a natural fit for us as it is genuinely empowering individuals within communities to deliver sustainable change."
Debbie Ladds, chief executive of Local Trust, said: "We are keen to share our experience and learning from Big Local to help all those involved in supporting community-led action nationally and locally."