Mileage and subsistence expenses....confused.com!!

Firstly can I say I have read the guidance and spoken to an advisor at HMRC who gave me a "best guess" answer, but I am still non the wiser. I work as a freelance outdoor instructor which means I don't work from home or have a usual place of work, I can be asked to deliver in any part of the country and by multiple organisations. I need to know what/if anything I can claim for in the following circumstances:- Mileage I travel 20 miles to deliver a days in school training then drive home again? I deliver two days 'in the field training' but am close enough to home to drive there and back each day? I deliver three days 'in the field training' with 24/7 responsibility for the group. I drive to the start point, drive to meet my group at several points during each day and drive home at the end of day three? I may have a job that finishes on the Monday evening and another starting on the following Wednesday morning in a different part of the country, can I claim travel between the two? Subsistence Can I claim for any meals in the above scenarios?

Hi

The rules for being employed and self employed are different.  Please have a look at the guidance atBIM37600 - Wholly and exclusively: duality of, or non-trade, purpose: travel costs: contents onwards.  
We cannot provide a difinitive answer, only guidance and its meaning.  You will need to seek out professional advice if that is what you want.

Thank you