trading on london stock exchange, page-132

I'm a small time investor. Dabbled in a few shares here and there over the years but don't trade them that much. Got a tip from a mate and got into OEX.

Just wondered if someone could give some technical advise on how trading on both ASX and LSE works.

I know the price is technically independent. The price is based on what two parties are prepared to buy and sell at any given time. But the price rises and falls tend to match pretty closely between the 2. I did some analysis and the historically the share price in ASX value in AUD is about 62 times less than the LSE in GBP.

Are we both buying and selling from the same pool of shares? When OEX releases more shares does it dilute both markets equally? Is there a percentage of the company that exists in one exchange and the rest in the other? How does it work?

When Magna are buying up shares and doing it in the LSE we can't physically sell our shares to them. So any rise in ASX is based on a perceived increase in value?

Sorry if these are dumb questions.