Вот появилась информация об акции Евростар 2for1:
Условия:
"You must hold a valid Eurostar ticket in order to take advantage of the Offer.
The Offer is only available at the galleries and museums in your destination that are listed at eurostar.com
For access to partner museums sited in France or Belgium, the Offer is only available to passengers travelling from the UK to France or Belgium.
For access to partner museums sited in the UK, the Offer is only available to passengers travelling from France or Belgium to the UK. You are not eligible to use the Offer in the country where you are normally a resident.
The following constitutes a valid Eurostar ticket: a Eurostar mobile ticket, a Eurostar paper ticket, a print at home Eurostar ticket, a Eurostar manual boarding pass, or any new method of ticketing utilised by Eurostar from time to time. Only one (1) person is required to hold a valid Eurostar ticket in order to qualify for the Offer.
You will be required to present yourself at the Ticket Desk or Welcome Desk at the Galleries in order to obtain the Offer.
You will be required to provide appropriate personal identification upon demand including proof of your usual country of residence.
The Offer is only available on full priced tickets for exhibitions at the galleries and museums and cannot be used in conjunction with any other offer or concessions tickets.
The Offer excludes talks, events, concerts and screenings at the galleries and museums.
The Offer is valid for five (5) days after the date of travel as stated on your valid outbound Eurostar ticket depending on your place of residence.
You may only use this Offer once per gallery or museum, per Eurostar journey.
No refunds or exchanges are available and this Offer is not valid for resale or transfer.
This Offer is subject to availability at all times.
During busy periods you may be asked to return to the exhibition(s) at an allocated time slot as determined by the relevant Gallery in its absolute discretion.
The galleries and museums reserve the right to amend or make any alterations to the published details of the event as shall become necessary from time to time.
The galleries and museums reserve the right to refuse admission to any of the exhibitions in their absolute discretion.
The Offer cannot be booked in advance.
No photography is permitted within any exhibition.
Please note that a Eurostar ticket does not grant you fast track access into a gallery or museum when there are queues to see an exhibition
Please note that the offer is not valid for the ‘Monet & Architecture’ exhibition at The National Gallery"
Если я правильно смогла перевести (поправьте, ели не так), то основные выводы для туриста следующие: при проходе в музей возможно предъявлять распечатку электронного билета ( а не только купленный в кассе билет, как у подобной акции National Rail), предложение действует также и в течение 5 дней ПОСЛЕ (?) поездки (т.е. им можно воспользоваться неоднократно, если все 5 дней ходить по музеям).
По перечню музеев, участвующих в акции:
Париж - музей Орсей, Оранжери, Гран Пале, Jeu de Paume и музей Бранли.
Лондон - Британский музей, Виктории и Альберта, Тэйт Модерн и Тэйт Бритен, Национальная Галерея, Национальная портретная галерея, музей Науки, Королевская академия искусств, Британская библиотека.
Акция также действует на некоторые музеи Брюсселя, Лилля и Лиона.
Ну, если с экономией в Париже понятно, то с Лондоном все очень странно. Практически все перечисленные музеи итак бесплатны!