Although these suppliers don't match your search for Manor house, Stately homes in Launceston, they are within approximately 40 miles and could still be of interest.
Venues, Manor house, Stately homes, Camborne, Cornwall
Now fully licensed for Weddings
Beautiful Roswarne House is set in 6 acres of parkland near the coast in Cornwall.
It's a proper Regency house dating from 1810 and contains wonderful spaces including a Marble Hall, Ballroom, Drawing Room, Library and curving Orangery. There are 29 rooms in all!
(Manor house, Stately homes in Launceston)