Firstly crush the ginger biscuits. I use the end of a rolling pin as it's super easy like that.
Then I crush the raspberries roughly with a potato masher or fork and set aside.
Whip the double cream until it's firm but soft peaks if you get my particular drift. Just as long as it doesn't go too far and looks like cottage cheese. Put it to the side.
Place the 225 grams (7.9 oz) of cream cheese, 100 grams ( 3.5 oz) of sugar, 200 grams (7 oz) of custard, 2 tsp of vanilla extract in a medium size bowl.
Mix well with an electric hand whisk or hand held whisk.
Add in the whipped cream. Mix in again with a whisk.
Line your 2lb loaf tin with two long pieces of cling film (plastic wrap) one going length ways and the other side ways so they form a cross if you get me. This is so it can wrap back over the top of the filled loaf tin later.
Dollop in about a third of the semifreddo mixture in there and smooth roughly level.
Add half of the raspberries and sprinkle heavily with a third of ginger nuts.
Repeat again and then finally top that second layer with just the remaining semifreddo mixture which will leave you with some gingernut rubble to sprinkle over the whole thing when you are ready to serve.
Lift the cling film/plastic wrap leaves over the loaf tin so that it is completely covered.
Freeze for at least 8 hours.
At least half an hour before you are ready to serve get this frozen beauty out and invert onto a plate before removing the plastic wrap completely and then sprinkling with the rest of your crushed ginger nuts.