Hi Mate
Im really sorry to hear what had happened to you and would like to try and help you.
Now this incident that took place, you say training was provided could you be more specific, i mean what did they cover in training. I also need to know that why was your colleague burning something at a building site. You say it was windy, which is understandable but then were does safety come into this, how close where you to your colleague when this incident took place, did they provide safety gear for this type of activity, was this part of the job description.
To be honest there are alot of factors you have to consider in order to determine a solution. We do get alot of work related accidents so these questions are vital, how where you getting paid, if it was cash in hand then thats a problem, meaning that you might not be on the books which eliminates all purposes of the claim, meaning then you have nothing to stand on, contact a member of the trade union if there is a union, address this issue to them about safety see what their opinions are.
It is very hard to determine if there is a case due to negligence as the statement you have provided is not specific enough for me to go on.
Im sorry but this is as much as i can do, if you come back with more information, then i can look at it in more depth and advise you further.
Thanks
The Claims Guy