Teir, that's interesting and useful info. I just want to install an ignition-only socket to power a phone charger to use my satnav app, so it only needs < 10 A. The dashcam (supplied by me) was hard-wired by the dealer (hence no possibility of voiding the warranty) and I'm pretty sure they used the supplied Nextbase piggy-back fuse, so it's likely that any spare ignition-only fuse positions are still vacant

And, by the way, don't be tempted to ask Skoda any Qs regarding fuses etc. When I tried this, they made it clear that they would not help me (even if they could) because I asked them a 'technical Q' and should instead ask my dealer. Who had already said "we don't know, you'd need to contact Skoda UK and ask them".  Which is why this forum is so useful: I'm regularly impressed by the level of tech knowledge forum members have.