Well, heres the follow on story
Initially, I emailed them to ask whether they had a 511 in stock. She replied within 2 hours saying yes we do you can order at any time. I placed the order along with quite a few other parts that were listed as in stock on their website. The stuff that was out of stock was greyed out and so gave me confidence that they were only listing stuff that they had. I went for the £50 EMS shipping option. 3 to 7 business days it claims on their checkout. Anyway, 6 days after placing the order i email them again to ask where the EMS tracking number is. My account was still listing my order as "processing". They reply with "sorry for the delay its not yet despatched as we dont hold lots of stock. We are collecting the items from the warehouse"
I told them that i only placed the order on the back of them saying they had it and asked what the point of the EMS £50 shipping option was ! !
Needless to say i was pretty pissed off and told them to cancel the order and refund me in full immediately.
Since then the comms have gone quiet aside from one email telling me they "are sending my items, and refunding me for what they havent got". They claim that my items are despatched and i will get the tracking number "later"
My account still shows as "processing", they are clearly playing for time now.
I have told them thats not good enough and i want my money back. They havent even told me what im getting sent. They have got just shy of £500 of my money at the minute. Sadly as i dont use a credit card, its straight out of my account too so i cant use the card company to sort it for me

I await to see the outcome.
The comms have been pretty good up until close of business Friday but theres definiotely a feel of "your having it when we get it"
If there is a happy outcome to this then ill be sure to post it up.
In the meantime, a very kind fella i know from Austria whos on here and on TamiyaClub offered to buy a 511 from Germany up front for me and ship it over to the UK. I took him up on his kind offer and paid for that too. Its now on its way.
I may end up with two Tamiya 511 kits at this rate
Living on Heinz for the rest of the month