Mining and keeping UK minerals?
Can I go to forests, national parks or mineral deposits and mine


I think the basic answer to this question is No, or rather, not without the land owners permission.

For example it is illegal to remove pebbles from a beach: Woman who 'stole' pebbles from a BEACH to decorate in her garden given police warning

For more information on mineral ownership in the UK see: Legislation &amp; policy: mineral ownership