Just bought a Planet X carbon road bike. Spent all last year on my mountain bike but racking up the miles was hard so bit the bullet on my first ever road bike!
Any tips on shoes/cleats and pedals would be appreciated. I don't want to spend much on them tbh, I'd rather get through this year and next with them and then upgrade to some decent ones once I'm up and running.
SPD pedals mate. They vary between £40 and £60 usually.
Buy your Shimano PD-RS500 SPD-SL Road Pedals - Clip-in Pedals from Wiggle. Our price £57.99. Free worldwide delivery available.
www.wiggle.co.uk
I'm sure you'd be able to find for less in over places, though!
If you don't have cleated shoes for your MTB (I guess not if it was just a standard MTB, you'd just have standard flat pedals?) then I'd say buy a pair of SPD pedals and you can always use them on the MTB too if you'd like and rotate (unless you're really wanting to give it some off road on the MTB, then guess you'd need proper 'trail/gravel pedals). Personally when I cycle off road, I don't really like using cleats, as the paths round me are quite sharp and often busy with walkers. That'll change when I save up to buy a gravel bike but that's a long way off for now (well, maybe not too long at this rate

- the bug gets you!)
Cleats you can get for about a tenner on ebay brand new, on wiggle they're about £18 IIRC.
Shimano cleats are the ones, and you want the yellow brackets as they're the best for rookie riders (reds are what the pros use I believe).
Buy your Shimano SPD SL Cleats - Cleats from Wiggle. Our price £20.99. Free worldwide delivery available.
www.wiggle.co.uk
Again, those are the road version but you can get specific MTB ones too.
The shoes, well personally I love the Shimanos I've recently bought, which are these:
https://www.wiggle.co.uk/shimano-rc100-road-shoes
But you can get plenty cheaper I believe. DPD do a good range:
https://www.wiggle.co.uk/dhb-dorica-road-shoe
For the winter, then there's overshoes etc too -
https://www.wiggle.co.uk/cycle/overshoes
What I'd say is, don't go cheap for the sake of it. It's probably better to get good stuff that will last, but might cost a tad more. Once you get used to them, you'll be fine with them (it was weird when I went back to using flats for an off-road ride a few weeks ago, tbh).