FIP suplement and Caledonian Sleeper

[odol]

Hi everybody
Is this possible to buy only a seat reservation for Caledonian Sleeper (London - Inverness route) to FIP ticket? And how much it costs?
If not can anybody tell me how much may cost bed reservation and is this depend of time of reservation is making? Can that may be buy in the day of travel or must be done for some time before it.

Thanks in advance.

 

[First class]

FIP/RST discounted travel is not permitted in seated accomodation on Scotrail sleeper services. You must purchase the berth supplement of £39 single, or buy a combined ticket+berth ticket which varies in price. The 50% discount rate for Poland FIP would not apply to the supplement.

You must book in advance. Berth reservations are limited and mandatory.