A macro lens is going to cost you more than your £250 budget anyway. The cheap screw on ones are crap.
I really don't like bridge cameras. The sensors are no better than a compact and the lenses usually have too long zooms which makes them not very high quality. So you end up with a big, bulky camera which doesn't give great quality results. There's not much advantage over a long-zoom compact like the Fujifilm F660EXR.
Unfortunately £250 won't buy you a large sensor EVIL or DSLR camera. There are some mid-way cameras around now though. Sensors between compact and APS sizes and interchangeable lenses too.
For £150 you could pick up one of these:
http://www.ebay.co.uk/itm/SAMSUNG-NX100-14-6-MP-3-INCH-SCREEN-COMPACT-SYSTEM-CAMERA-WITH-STARTER-KIT-NEW-/330812078207?clk_rvr_id=402608756434
When you've got another £150 you could then add a nice telephoto:
http://www.currys.co.uk/gbuk/samsung-ex-t50200ib-ois-i-function-50-200-mm-f4-0-5-6-telephoto-zoom-lens-17299626-pdt.html
It's not got many lenses available like the popular DSLRs, but it will give you good photographs on a tight budget.
There is a 60mm macro lens, but it's not cheap:
http://www.ebay.co.uk/itm/Samsung-NX-Macro-60mm-f-2-8-ED-OIS-SSA-Lens-60-NX10-NX200-NX20-NX5-NX100-NX1000-/160901553242?pt=UK_Lenses_Filters_Lenses&hash=item25767adc5a
Mind you, by Nikon or Canon standards that's quite cheap for a macro!