Hi MM,
Looks like you're not too far from me, i'm based in Greenwich. Basically i have the exact same car but L&K Spec and just had my cambelt and water pump done at 102K miles this year. Checking the book and forums it's basically 5 years or 100K miles roughly. I was also having a problem with the coolant level dropping like crazy during parts of the year and this was linked to the cam belt/water pump and all fine now but was pretty serious at the time. I've used Skoda Beadles Maidstone for all my Skoda Superbs (MK2 and now MK3) and find them very professional, efficient and reasonable price wise (they've won awards for customer service). The only problem this year was getting the car booked in earlier the year due to the pandemic but they really did they're best for me. MarkyG82 has a point about the water pump but they should be good until 75K miles, mine went to 102K before giving issues but probably started around 100K.