Y adapter.2 -3.5 output plugs to one 3.5 female socket.Help pls.

[Doobrey]

I couldn't see the exact splitter you need at Maplins, but it's possible..
 
Get L32BA (2x phono to 3.5mm stereo plug)
Now either chop the stereo plug off and solder on a socket (RK51F),or get a female-female adapter (JK05F) and just plug it all together

Probably easiest to get the f-f adapter, although it is a massive 20p more than the socket  :-D