I reckon the easiest for this is probably a raffle ticket draw by an independent person at a public event - Herne Hill would work very nicely if everything is sorted by Tuesday. Filmed and posted would be great.
The lottery balls idea has the advantage of being instantly checkable and clearly independent, but things like the requirement for '9 or over' for the second digit are not immediately intuitive - well, it took me a while to see the logic for it, though I think I get it now.
OK, paid ...
I reckon the easiest for this is probably a raffle ticket draw by an independent person at a public event - Herne Hill would work very nicely if everything is sorted by Tuesday. Filmed and posted would be great.
The lottery balls idea has the advantage of being instantly checkable and clearly independent, but things like the requirement for '9 or over' for the second digit are not immediately intuitive - well, it took me a while to see the logic for it, though I think I get it now.