Saw yesterday on coindesk there is a new UK exchange opening - www.coinfloor.co.uk: -

http://www.coindesk.com/uk-bitcoin-exchange-coinfloor-opens-registration-incentivizes-early-adopters/

Further information here: -

http://www.reddit.com/r/Bitcoin/comments/21i77z/coinfloorcouk_native_uk_exchange_goes_live/

I'm not affiliated with this in anyway - I want to let fellow Brits know about this  

We need a decent exchange for the UK.

Hello,

I was wondering if anyone can put my mind at ease and let me know if I messed up?

I sent a payment 0.998 using the Android client and it by default (which I didn't know) didn't place a fee on the transaction.

https://blockchain.info/tx/2a4e88ad42f79aa68ae06bec984d8952c29326ab1037de97d944bcfae5a7d460

As I needed to get this sent within an hour I read in some threads about double spending to overcome this. So I imported my private key to bitcoin-qt and I then tried to send all my coins 1.2ish to another address (to affectively double spend). I've included a fee this time which was 0.00025 per kB which then totalled 0.00075 due to the transaction size. I've left the transaction for about 30 minutes and its still not confirmed and only propagated to 21 nodes in about 30 minutes. At this rate is seems like it will take a long time although I've included a fee?

I know its not hit blockchain yet - https://blockchain.info/search/6e1794b68f17b8a375d1f9a97a2adf3e9fd6840856b4ddc23adb8a8ac77d5b2b

So my questions are: -

1) Will the double spend method work?

2) Would Blockchain give up after a while with the original transaction? Its 2413 bytes.

3) Why is blockchain-qt taking such a long time even though I've included a fee? Is this fee unreasonable?

4) Should I just remove the unconfirmed transaction using pywallet and wait on the original blockchain transaction?

 

Many thanks in advance - I have read around quite a few different thread before deciding to post as I'm now quite stumped!