Saw on MSE that Fitflop have a sale on and if you use code MSEXMAS25 takes 25% off of the sale price.
Also, used code CYBERFF for free next day delivery but that was yesterday, and although you can still use it today I don't think they guarantee the timeframe now. Will probably still arrive quicker than standard delivery though so worth using. I ordered some other shoes today but I'm not too worried if they don't come before Christmas.
I bought the Canvas ballerina shoes in raspberry which were originally £65 in the summer and got them for £14.25. Sizes available when I last looked were 5, 6, 7 and 8 (reviews were saying they came up small though).
Also bought my mum some sandals. Original price £70, £29 in sale, I paid £21.75. Free delivery as I said and also free returns I think.
Lots of other styles available at different prices, including some boots. May be worth a look if you are interested.