I am planning on walking in a straight line across the UK , without walking more than a couple of meters of the line. Tresspass is legal in the UK but I want to avoid angry farmers if possible.

Is this possible?

Can anyone suggest a slightly better route or variation of the line I just drew?

Can I start at any point on the estuary / river or should my line start from a beach or something?

I want to be as faithful as possible to the line.

Thanks!