On The Sands cafe is changing hands on Dec 23rd, being taken on by the current chef, but is closing for a refurb, probably for the whole month of January, so worth checking before you next go there. There is nothing on their website about this at present.
Might be worth considering whilst Long Clawson and Hickling Cafes are shut. I’ve not been but the Vale of Belvoir Ladies have and recommend it. Prices look quite reasonable and it’s open everyday. https://www.naturescape.co.uk/wp-content/uploads/2019/09/A5-Menu110919.pdf it’s on Coach Gap Lane, which is on the left as you head out of Langar towards Harby.