ONE of Britain's richest men is to open the gardens of his Lancaster mansion this Sunday to help raise money for the Cystic Fibrosis Trust.

The Duke and Duchess of Westminster open the 39-acre ornate gardens at Abbeystead Mansion, four miles east of Dolphinholme.

Visitors will be able to enjoy a bring and buy sale and other stalls as well as taking tea in the sumptuous surroundings.