I haven't, not because of fears about my personal safety, but because some transport operators (e.g. the Settle/Carlisle railway) are still saying they should be used for essential travel only. So it's more fear of meeting with disapproval or being turned away. I also hear that areas such as the Lakes are (no doubt understandably) not keen to welcome visitors from other parts of the country at the moment.
I don't drive (did pass my test years ago, but never really got to grips with driving independently) so hillwalking has been off the cards for months, sadly. Starting to think maybe I should make another attempt at it...