* Parliamentary visit expected in next few weeks

* Families of IRA victims seeking compensation from Libya

By Tim Castle

LONDON, Oct 16 (Reuters) - Tripoli has invited a delegation of British parliamentarians to Libya to discuss the case of families of IRA victims who say Muammar Gaddafi's regime helped arm the guerrillas, lawyers for the families said on Friday.

"The delegation will meet with their counterparts in Libya to discuss the tragedy of the UK victims while proposing a way forward to resolve this matter," said London legal firm H20 Law.

Campaigners for Irish Republican Army (IRA) victims want compensation from Libyan leader Gaddafi, who they say shipped Semtex explosives in the 1980s and 1990s to paramilitaries fighting to end British rule of Northern Ireland.

British Prime Minister Gordon Brown said last month he supported the families' campaign.

He said British government officials would join the campaigners in meetings with Libyan officials to negotiate compensation.