I am doing this as my starter for tomorrow and am trying to get as much of my menu done in advance today. Can I make this today or am I better to make it tomorrow?

Leek and potato soup is fine kept overnight. The only thing I would say is if you are adding cream, leave that untill you have reheated it.

Cheers Rosti. Looks like it is myself and DH in the kitchen together. He is making tonights dinner - how romantic

Hope all went well I forgot to ask what else you were having.