I am looking for some advice again following the release of EC's advance tickets.
We are looking to travel (2 adults and 2 children) from Chichester to Edinburgh on the above dates. We do not have any railcards, and would ideally like to travel outwards in the morning of the 27th December, and would like to return in the afternoon of the 30th December. First class, as long as the price is not too extortionate!
First Class with children aged 5 - 15 does tend to be extortionate because
Family & Friends Railcards offer no discount on First Class fares.
The first recommendation is to buy a
Family & Friends Railcard. You're likely to save more than the Railcard costs on this journey alone.
It appears that FCC Thameslink trains will be running through central London on Friday 30 December but not on Tuesday 27 December. When these trains are running, then by far the easiest way across London on this journey uses a cross-platform or same-platform change at East Croydon and a short walk between St Pancras and Kings Cross.
I would recommend watching the
Southern site daily and booking Advance tickets from Chichester to Victoria, and from East Croydon to Chichester for the appropriate dates as soon as they become available. Until 31 October, there is a 34% discount on
Southern's Advance tickets if bought on that site. It's not worth paying for First Class accommodation on
Southern's Class 377 trains. First Class and Standard accommodation is almost identical.
Similarly, watch the
East Coast site daily and book Advance tickets London - Edinburgh and return for the appropriate dates as soon as they become available. There is a 11% discount on
East Coast's Advance tickets if bought on that site, and you can use the
Choose your Seat facility to ensure that you are all placed around a table of four. If you do decide you wish to upgrade to First Class,
Weekend First is likely to be available on weekdays between Christmas and New Year. It costs £25 per person for a single London - Edinburgh journey and must be paid on the train. It cannot be reserved in advance. There is no Child discount, so this would cost £100 each way for your party of 2 Adults and 2 Children. The
weekend service of complimentary items applies on days when
Weekend First is available.
Children aged 5-10 travelling with an Adult get free London Underground travel. The cheapest way to pay for cross-London Underground travel and for St Pancras - East Croydon is using
Oyster cards. For all you ever wanted to know about
Oyster, see
MikeWh's excellent site at
oyster-rail.org.uk. But
Oyster does have the disadvantage of having to go up the ramp at East Croydon to touch in or out. Alternatively, buy single tickets on the day of travel. For St Pancras - East Croydon, use your
Family & Friends Railcard.
Finally, I disagree with
paul1609. Chichester - Edinburgh by rail is a very pleasant journey indeed and you are likely to be treated much better on that journey than at any airport these days.