With respect, £25 is ridiculously cheap - if this person does good work and you are pleased with the end result I am pleased for you. Just a few pointers to consider: NEVER accept a logo that has been designed in Photoshop, if it involves gradients / shading / "shines" chuck it back at them and tell them to try again; they are "trendy" and will make your logo look outdated within a few years. You need to receive a Vector logo in CMYK at the very least.
Thank you for liking my post but actually I am very disappointed that someone on here would even offer a logo for £25. A proper logo design requires a lot of two-way communication, a LOT of research, drawing by hand, making mock ups on the computer, refinement and finalisation. If a person can do all that for £25 then fair play to them for working for less per hour than ASDA pays. Otherwise I would guess you will be receiving a logo with very little time & work put into it.
You have criticised Tony for his £250 price tag, mine would have been £500. Does that make me twice as bad?
Ultimately though if you are happy with the end result and your designer is happy to work at such a low rate (that frankly belittles the rest of us and our ability to express how much detailed work goes into a proper logo design) then all power to you.
Good luck with your new organization.