The booking site appears to think your origin is NR and your destination is LU; it's the other way round.
It also incorrectly says it's a non-refundable ticket (technically it is refundable but admittedly the fees would make it not worthwhile)
I'd suggest asking for a refund (a full refund, without admin fee should be provided due to the error) and book it from our website, which works much better than Avanti's site.
Edit: I've just checked, and can confirm for sure, that we are offering it the correct way round!
Not quite; it would be fine the other way round.
The ticket
should be accepted with the accommpanying itinerary,
however the LU gateline at Euston [Square] may not allow entry.
, though if you are going to the stadium, far easier to just walk 5 mins to Euston Square and take the Metropolitan Line to Wembley Park...
Probably, but in order to say definitively I'd be wanting to know if walking was an issue and also exactly where the final destination is (e.g. is it the stadium itself, or perhaps the Premier Inn at Wembley Stadium?)
which is just as near the stadium, just the other side
Definitely not "just as near" however depending on the exact entrance, that may skew it. The walking distance from (say) the Wembley Stadium Premier Inn or Ibis is much much shorter to Stadium than Park; if you're a slow walker it could be an additional 10+ mins, by which time you could be almost at Marylebone.
(Or the also direct Euston to Wembley Central Overground but a not very lovely 15to 20mins odd walk through Wembley with kids.)
Again it depends on where exactly in Wembley the destination is; if the destination was (say) Wembley Triangle then I'd certainly be heading to Wembley Central.
A contactless bank card used for either of these journeys would have been only £3.20 at the time stated and the children travel free if under 11.
Yes, to Wembley Park/Central children would be free, but only if under 11 and accompanied. This wouldn't apply to Wembley Stadium (see
map)
The basic question can be answered easily enough: this is an issuing error. But if the question is what route to take, we don't have enough information to definitively answer that. Google Maps is actually pretty good in this area, though some of the connection times can be a bit iffy.
Wenbley Park/Central stations are each approx 15 to 20 mins walk (depending on walking speed) from Wembley Stadium, so avoiding the change at Marylebone isn't necessarily going to be quicker. It really depends.
