Mouse for £35

Some reviews here: http://www.bit-tech.net/ (UK site) and vid here from HardwareCanucks: https://www.youtube.com/watch?v=02X3ZLUsojU&list=UUTzLRZUgelatKZ4nyIKcAbg

Roccat Savu. Has 2 extra buttons. If you wish, you can assign one of them as a "Shift", so u suddenly get 12 total. Check it out.

get a maxxter gaming mouse. Its about 5 euros

Dunno where you live but here amazon has a nice roccat at 50%, take a look at black friday's deal :P

http://support.logitech.com/en_us/product/gaming-mouse-g300

G400, it's basically as an upgraded MX518 and worth the price. Amazon has it for £32 atm - http://www.amazon.co.uk/Logitech-G400s-Optical-Gaming-Mouse/dp/B00CJAEX70/ref=sr_1_1?ie=UTF8&qid=1416936960&sr=8-1&keywords=g400

I've been using the Redragon Perdition, nice mouse. I come from a Razer Naga Hex that malfunctioned, and the Perdition is not a bad replacement.
http://www.amazon.com/Redragon-Perdition-Precision-Programmable-Cartridge-profiles/dp/B00GU8W5AE/ref=sr_1_1?ie=UTF8&qid=1416937951&sr=8-1&keywords=redragon

Go for TTesports, any model.

I used Black Element,Theron and Level 10, are all freakn awesome.I'm using a Black Element with 5800 DPI right now, I rock at all games.

I'm about to buy the Logitech 502. Its for $55 on eBay. Not too sure on currency conversion.

For £33 UtechSmart Venus 16400 DPI High Precision Programmable Laser MMO Gaming Mouse < lol dat name, looks really nice imo, specially for that price, others like this cost about 35-45% more.

I hope she wash the dishes for that price

logitech G100 for only 13 euros

I'd suggest Logitech G300 for a fingertip grip, if you use one.
The button placement is usable as fingertip users tend to not use the thumb for button as that's the only few finger that's moving the mouse.

I use this one and totally advise it Bloody Gun 3 V7
It has 2 extra buttons on the side (the most common type) and can have has much has 3 diferent profiles.
The Drive program has alot of extras and nice stuff to play around but for the price is a very comfortable and nice mouse, give it a look :)

Have a nice day.

Gigabyte M6980X is pretty interesting for this price range

This is the mouse that i have. And its currently on sale for £15!!

From my limited knowledge, a G400 is likely what you're looking for.