Prepare yourselves because as hobbies go they don't come much wilder or more brutal than this.
What young boy, or girl perhaps, hasn't pretended to be a brave Knight fighting for King, Queen and Country? Well, a group of grown up men in Sussex have taken that dream a step further - and they're not pulling their punches.
Andy Dickenson reports and speaks to Nikolaj Malnac, chairman of Battle Heritage GB, knight Gwilym Rees and British team captain Mark Taylor.
Andy Dickenson reports.
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The Government has previously described the new coin - which enters circulation on Tuesday - as "harder to counterfeit than ever before".