You should be ok for a two week holiday with a booked return, unless you're really unlucky.
I live & work overseas with 3dc, & have been stopped multiple times when they were younger.
My employer flies us to Forn Parts each August, then back to UK each June.
So if we did a Xmas or Easter visit to UK family, with me paying for the flights, the 'outbound' flight was to the UK, & the 'return' was to a hot, sandy place that isn't a Hague signatory...with no evidence that we were ever returning to the UK.
Me with 3 UK passport bearing minors & no other parent in sight.
We used to routinely get stopped, despite all having the same name.
I would have to prove that we were ordinarily living overseas - not just the court order stating this but residency cards, kids' school reports, kids questioned - family joke was that everyone resisting the temptation to say 'NO SHE ISN'T OUR MUM, HELP' got double pocket money...
I'm glad they're vigilant tbh. I'm also glad I now have 3 hulking 6' young adults & am spared the hassle & delays these days 😆.
But you should be fine with your holiday! It's people like me that look dodgy 😁