Prepare your ramekins/glasses that you're going to use - I used leftover Gü dessert ramekins
Crush the lighter digestive biscuits in a bag with the end of a rolling pin or something to a fine crumb and then separate between the ramekins
In a bowl, loosen the cream cheese (I used lightest Philadelphia) with a spoon then mix in the 0% fat vanilla yoghurt and caster sugar until smooth - it might take a bit of beating. It will be reasonably runny, as that's the nature of low-fat ingredients, but you can try to thicken it with an electric whisk here if you like for a couple of minutes!
Pour between the ramekins and top with fresh berries of your choice
Refrigerate until needed or overnight to set slightly if you prefer
The caster sugar isn't essential, but it makes the cheesecakes delicious - I find low fat cream cheese for example has quite a savoury taste, so the sugar makes it creamy and delicious!
You can use other flavoured yoghurts - but I find that the vanilla works best!