We mentioned to the estate agent that we were thinking of asking for a two month delay as a cut in stamp duty would have a major impact on our finances, but I specifically asked him not to go to the vendor and tell them that we were demanding it.
A day later we get an email from the EA saying how disappointed the vendor was in us but that they'd reluctantly agree to our demands... Whilst it's good news for us, it's put the whole relationship under a fair but of unnecessary strain. I don't really mind, but my wife has been quite upset and stressed about it. All very annoying.
I'm somewhat annoyed in myself for not expanding our search areas that little bit more, as we've since found a few properties in a neighbouring area that, while costing a little bit more, offer quite a bit of extra space (detached/semis, bigger garden, etc). At the moment there's sweet **** all on the market in our price range. I'm certainly not disappointed about the place we're buying and can't wait to see what it looks like once all the renovations are done, but my wife is more than a little nervous about the sheer scope of the works required.