Toilet seat nut

[Snatch84]

I'm trying to tighten up a toilet seat. The nut is a straightforward metal 10mm hex nut (no wings or thumb bits like in the plastic ones). I've tried buying a box spanner but the kit I've bought doesn't have the right size (has 9mm & 11mm). From googling it doesn't seem that any of the major diy stores sell a box spanner in the size I need?

I see that screwfix sell a toilet seat installation tool but helpfully make no mention of what it fits - does anyone know? http://m.screwfix.com/p/toilet-seat-installation-tool/62412?kpid=62412&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&cm_mmc=Google-_-Shopping%20-%20Hand%20Tools-_-Shopping%20-%20Hand%20Tools&gclid=CKOf4YyOgsoCFU2NGwodCrAA3w

Does anyone have any other suggestions?

Please help before I pull my hair out or go flying across the bathroom again..!

 

[PrenticeBoyofDerry]

http://www.screwfix.com/p/box-spanner-set-8pcs/4883f

 

[flameport]

Or this which is intended for taps but will still fit: http://www.toolstation.com/shop/Hand+Tools/d10/Plumbers+Tools/sd210

 

[Snatch84]

Thanks both! I'll head to Screwfix tomorrow and give that box set a try.