The normal Saturday to Saturday rules cannot apply this year, particularly for Christmas as it is not possible to effect a changeover on Boxing Day !
So for Christmas Week Sat 19th to Sun 27th the cost is £735 for 8 nights
New Year Week Sun 27th to Sat 2nd Jan the cost is £635 for 6 nights
Update 28th August Booked 27th/28th/29th/30th Dec