Against the backdrop of the backlit Victorian Bletchley Park Mansion this event, the third of its kind, held in partnership with West Bletchley Council, will feature a lantern parade by local youngsters around the gardens.
The CK Gospel Choir will be performing some Christmas carol favourites while the Woburn Sands Band will be filling the air with cheery Christmas tunes.
Making an appearance will be Santa Claus along with his sleigh, courtesy of the Bletchley Round Table.
In Hut 4 restaurant there will be refreshments including mince pies, turkey, cranberry rolls and mulled wine; children can also enjoy the traditional fairground rides while the grown-ups can browse the craft stalls in the From Bletchley, With Love exhibition hut.
Payment at the gate is adults £2, children £1.
There is free on-site parking.
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