Hate to be proved correct, but looks like I was only a week out on my estimate....
Intersango seem to be unable to accept GBP payments at the moment.
I think you should assume that your Lloyds account will not last long. 1-2 months I would guess. The Branch Manager may like you as helps them hit their target for new small business accounts, but as soon as the info gets up to the Risk Management / Compliance / Money Laundering / Head Office you will be out.
You should open a few other accounts as contingencies. Maybe try http://www.bocukltd.co.uk/
or some other odd banks as none are going to be your friend.
Or maybe try some offshore accounts.
Not wanting to be a troll, and have used you to buy £150 of btc's (just in time!), but the reputational risk for the bank is significant (hit-man paid in bitcoins extracts cash through Lloyds account etc...) and the income you will generate for them will be small (relative to billion+ profits).Good Luck - I think this is the one area that is going to be very hard for bitcoin.
I think we should all move to a new approach, a new software/site, based on something like Dark-Exchange integrated with Bitcoin-OTC integrated with Bitcoin Client integrated with some social network, maybe Diaspora.
So, everybody will be able to buy/sell Bitcoins and use their own bank accounts. Ending the problem of exchangers being unable to work with banks after some time.
How long will take for U.S. gov try to take down the Bitcoin traders (a.k.a. MtGox/TradeHill/CryptoXchange)?
We need a easy way to bring regular people to the trading environment. People as mini-mtgoxes around the world...