On the beach holiday. Jet2 flights seats.

[LifeisNOTlikeemmerdalefarm]

I have booked a holiday with on the beach.
The flights are with Jet2. How do I book the seats as
not able on the beach site.
I've been on the Jet2 app and put in the code it just says
a link will be sent to the email I booked with.
This was over 5 hours ago. Should I contact on the beach
or leave until tomorrow morning.

You can probably also do it with the booking reference, date of travel and the last name of the lead passenger.

But it's really not necessary to book seats with Jet2 as 99% of the time they'll sit you together anyway. Check in opens about a month before your outbound flight so if you do it then, they'll almost certainly seat you together for free.