Place the liner in the hole and move it around to bed it into the sand. Never stand in the liner - you could easily damage it.

Check that the lip of the liner is in the right place in relation to the ground to suit your edging plans. Place the length of wood across the liner and check it with a spirit level. Do this across different parts of the liner. If the liner isn't level, remove it and rake the sand out of the high spots and into the low spots. Repeat until you get this right.

When you think the liner is perfectly positioned, start to add water. Only put in a small amount to start with, to a depth of around 10cm (4in), to weigh down the liner and settle it firmly onto the sandy base. You may like to cross your fingers at this stage, because if the liner settles unevenly, you'll have to empty out the water, remove the liner, and level the sandy base again.