Any question answered...

Not measured the post. Its a Thomson,...is manufacture error a realistic possibility?

Unlikely with a Thomson, I'd expect their process control to maintain tight tolerances

That gap looks way bigger than 0.1mm, one of your measurements is wrong.

Urgh.
Able to tell by photo of the ST been reamed?

EDIT
Double urgh. I have an oval seat tube, hopefully just the head, measures ~27.0 front to back

Fucking chain came off again, twice...what the fuck am I doing wrong?

Second time was going relatively slow and on smooth road?

You'd take the car to the scrap if it failed this much.

Tight link? Slack chain? Worn chain? Worn chainring or sprocket? Chainline off?

Chainline is fine
Chain ring isnt
Its not slack but has a tight spot
Chain isnt old
Sprocket could be...is shark finnng time to replace?

So new chain with old cog and chainring?

Nope they were new together

Too much pedaling.

I only peddle dreams

You're obviously leaning.

Stop it

From my post a day or two ago.

The serratted bits are worn on my newish track nuts so wheel would slip.
I think I over tightented the wheel as on the other side of the f/f hub the chainline is out now and the wheel doesnt spin by hand.

Shopping list:
Wheelset
Chain
Chain ring looks fine to me

credit cards: is it likely or unlikely that a bank that gave me my credit card, will give me a 2nd 'balance transfer' credit card for me to transfer my current balance over from, or will i likely have to go somewhere else

Unlikely, moneysavingexpert has one of those calculators for balance transfer cards so you can see which is best.

You can't usually transfer a balance within the same financial organisation, so if you are shopping around make sure you know which actual bank licence lies behind the branded card you're looking at.

The battery on my casio watch died a couple of months ago and I finally took it to a watch repair place this morning to have it replaced. They tried to charge me £13.95, which is a joke considering the watch didn't cost that to buy in the first place. Where can I go to get it done cheaper than this, or is it perhaps possible to do it myself?

^I'd ask that in the watch thread too, Hats. I'm guessing you might need special tools to prize of the back of the watch, etc..

Good call, I forgot that there's a watch thread. Thanks!

^^

If, by special tool, you mean "kitchen knife".

Although I do have a load of jewelry screwdrivers & tools that you may borrow, hats.

Exactly. Thats what I'd do. Depends on ones standards though, doesn't it!

^^

Damn - Should have said that I have a special tool that you could use.

^

That was a cock joke, by the way. Just in case anyone was wondering.

No, you're a special tool.

You can sometimes buy mini screw driver sets from a pound shop for a urrr, pound.

No sweet xmas cracker prizes?