Had this issue with my Boardman CX two weeks ago. Unfortunately got the the point where the chain snapped.
Got a new X10 chain like you, and it was pretty easy to fit. I'd use the power links that come with the chain as I also got some spares - tried them first (as I didn't realise one would be supplied) and they were ridiculously stiff to close to the point where I gave up. After speaking to some lads at the club they said you need to get on and pedal, really jamming the chain hard, but I'm a bit nervous of doing that when the link is just balanced on itself.
Anyway, worth having some spares though so you can make any running repairs on the road if necessary. I had to admit defeat and phone my dad when it went
I've got a chain breaker on my multitool which goes with me, so I'm happy that now I have spare links I'm covered for most things when out and about.
Another tip was that while replacing the chain I also took the opportunity to take off the cassette, strip it down and thoroughly clean it (and the rest of the drive train). I bought a dead cheap removal spanner and chain whip from wiggle as it's something I'll want to do myself again in the future. Also got a chain wear measurer as if there's too much stretch the cassette won't take the new chain and will need to be replaced. Might be a handy thing to do if you want to find out more about maintaining your bike and you don't do this already. I was certainly pleased to be able to do it myself.