Not strictly bushcraft but I'm sure most people with an interest in outdoor life, woodlands and the like will find worth a look if you're looking for somewhere to go for a day out this summer. Westonbirt Arboretum have a week long festival of the tree from August 24th untill 31st
http://www.forestry.gov.uk/forestry/infd-6xclux
http://www.forestry.gov.uk/forestry/infd-6xclux