Hi,
I would try and find out if he intends to game with mouse and keyboard or a controller if you have not already done so.
I have had the older version of this keyboard for about 5 years and works perfectly (amazon link
HERE) its actually available for £34.99 on Box.co.uk
HERE (amazon is £39.99) in terms of a mouse your probably looking the same again, I would recommend Madcatz maybe a rat 3 or 5, Logitech or razer (might be worth looking on amazing black Friday as they were cheap last week so may drop again).
Alternatively something like this mouse for £15 (
Here) is perfectly fine (I have the same one I used as a spare when my gaming one broke and its fine), they also do a keyboard and mouse pack for £23
HERE which has really good reviews, however I believe the keyboard is US layout.
I asked about the pad as if he intends to game on a pad I would buy the cheaper mouse and a cheaper keyboard and buy an xbox pad and sender which is about £35
HERE or if he already has an xbox 360 he can use the pad and just buy a sender for about £15 - £20 (
LINK).
Hope that helps.