Posted: 07/03/2015 at 18:27
As someone who grew up in a farming family I would never pick blackberries from someone's field without the permission of the farmer - it is theft. Also, unless there's a public right of way, what would you be doing in the field?
Digging up or picking snowdrops and other 'wild' flowers is illegal unless you have the permission of the owner. Some plants are specifically protected by law and cannot be dug up even with permission.
All land belongs to someone - there is no 'wilderness' in the UK. Keep to public rights of way and always ask permission from the owner before picking .