To chit or not to chit?

There is no need to panic as there is actually no need to chit it all. It does get the spuds off to a head start, though.

If they're somewhere warmish at the moment, that process will have started anyway. For the sake of a few days, leave them where they are, they won't develop weak chits in that time, then get them into the light when it's warmer.

Do you have a coolish room in the house? They could do with being somewhere light, although it won't hurt for  couple of days.

We are going to have some sharp frosts in the next few days so beware of putting them in a shed.

I would bring them into the house for a few days. That will break their dormancy and start the chits. Once the weather gets warmer put them somewhere cool and light.

It will be planting time within 2/3 weeks or so. The important thing is to break the dormancy so that they start to grow and do not linger in the soil.