A charity chief executive is stepping down after four years in the post.

Kat Williams has left the Sussex Beacon in Brighton with immediate effect.

The reason for her departure from the charity, which supports people with HIV/Aids is not yet known.

Simon Burgess, chairman of the charity's trustees, said: “The trustees are very grateful to Kat Williams.

“She showed great compassion and commitment in this complex and challenging role. During her time with us she successfully expanded the charity's services and events.

“Our charity like so many others has been facing tough financial challenges but this year's Brighton Half Marathon was our biggest fundraiser ever and the community have been increasingly rallying round to help us.

“We wish Kat well with her future career.”

Simon Dowe has been appointed interim chief executive while the hunt for a permanent replacement takes place.

Ms Williams was said to be on holiday and unavailable for comment.