The Dragon of Pendragon Castle

The Dragon of Pendragon Castle is a 1950 English family film directed and produced by John Baxter.
The film features Leslie Bradley, David Hannaford, Lily Lapidus and Hubert Leslie in the lead roles.
Plot.
Mr. Ferber (Leslie Bradley) is an old man living in Pendragon Castle along with his two grandchildren Bobby(David Hannaford) and Paddy (Graham Moffatt) who find a small dragon to heat their castle. The dragon helps them to find hidden treasure in the castle.