To be honest, I think the price you've paid for the two services isn't too bad at all. Iridium spark plugs aren't particularly cheap anyway when you peg normal ones for the 1.2 for instance at just £12 or £13 for four, dammit, I forgot to add four plugs to the old POP too! Lol, my maintenace costs for the old POP seem to have now hit about £360 over the 2 and a bit years....apologies to all for my memory lapse...again!
I think your cambelt and waterpump change price wasn't too bad either. The going rate for a lot of cars, well clearly, size/complexity dependent, can cost upward of £350.
Dampers, again, Bilstein, good price, plenty of places that can charge over the odds, so your supplier seems to be reasonable on price and the 30 quid fitting charge was a bargain.
Tyres, I'm not one for buying top end brand more the middle price area except for spares when I'll cheap it out with budget.
Wish we had the sixth gear on our little one, but got to be realistic, it is a little engine.
Overall, yes, a grand is a lot of money, but if you're keeping for a long time and you really enjoy the car, money well spent.