£400 to spend on V1 gear/lenses - help me choose

Ok, so I have a £400 voucher to use at the London Camera Exchange (UK store) after I have taded in some of my older gear.

I am looking at buying some bits for my Nikon 1 V1. 99% of my shooting is casual stuff like landscapes, historic buildings, flowers and my dogs. Occasionally I like to shoot action shots at the local airshow which is held once per year.

I currently just have the 10-30mm Kit Lens, and was thinking of the following:

- 30-110mm Lens

- 18.5mm Lens (for low light shots) - but I am torn between this lens and the 10mm lens - which would work well for landscapes. Seen as I already have the 10-30 would a 10mm prime lens be rather pointless - and should I go for the 18.5mm instead?

These two lenses will just about use up my available funds - so other things like a flash and FT-1 adapter will have to wait until much later this year.

Many thanks for any help or advice:-)