UK short break in January

This year had been very difficult for lots of reasons and I feel I would like to get away for a few days after Christmas. DH and I usually go away somewhere hot in February but this will not be possible next year as we cannot leave 93 year old MIL. I would love some ideas for a winter UK break on my own. I am not one for health farms or spas but would love to just walk and read and recharge with things to see. I live in Bucks so pretty central for travelling. I need some inspiration please!