Personally would be better to get one nearer your county as if there are any problems you can get the dealer to sort out even though the Honda used car warranty is UK wide. I would suggest to purchase from a Honda franchise and dealer as their service are usually top notch. Cars are serviced and small dents are repaired. But do check out the car and if you see anything that needs fixing, let the sales executive know. Used Honda has a 12 months warranty which is quite comprehensive and doesn't go through a third party. With the reliability of the Jazz, you will be better off using that money for a service plan may be rather than going for a two years warranty package?
I had a quick look at Autotrader and there are many at £9k mark but don't be afraid to look over that mark. In my experience, you can get at least £500 off the list price, but as it's the beginning of the month, discount may be difficult. But test drive the cars now and buy end of the month for more discount. If the figures don't add up then get them to throw in a set of mats and a tank of petrol and a free service/road tax to make up £500. Remember to get the figures down on the car before discussing the part exchange. Beware of products such as GAP insurance etc.
I also seen a few ES-Plus 2014 but with mileage around 6k miles for around £9k. The spec is similar to the EX but without the panoramic roof.
Good luck and hope you can join us very soon.