For once the exchange rate is working in my favour! I'm heading over to the UK in a few weeks so will spend some of my holiday money when I get there and save a bit of postage.
I would opt for tubes personally - even if you (gy) write 'do not bend' someone somewhere along the line will bend it.
Also, can't believe your postage is going up again, it's getting ridiculous.
3b in South Australia.