[Tsiklon]

How far in advance did you check?

If you’re flexible on departure time - Eurostar offer £35pp tickets

https://www.eurostar.com/uk-en/find-lowest-fares

Less convenient, certainly but this does narrow that gap

[4878241143]

Picked a weekend at the end of this month - depart Friday, return Sunday. Same dates for the flight (used Skyscanner).

[Symbiote]

Leaving on Friday 29th, returning on Sunday 31st, two adults:

- Plane, Veuling, €320

- Train, Eurostar, €510

The preceding weekend has slightly cheaper flights from "London" Southend airport.