I see this has just gone live on the Retro Railtours website; it may be of interest to some people here 

The Master Cutler
Retro Railtours - aiming to provide tours for enthusiasts and daytrippers
retrorailtours.co.uk
As part of the 125th anniversary of London Marylebone station, Retro Railtours, Rail Adventure and the 125 Group have worked in conjunction with Chiltern Railways to bring you 'The Master Cutler' train, as a nod to the famous named train that originally ran along the Great Central route from Yorkshire to the capital. As sadly most of the original Great Central route is no longer in use, the train will run via the Midland Mainline as far as Leicester, before travelling westwards towards Tyseley and along the Chiltern Mainline to Marylebone.
The train will be formed of a rake of InteCity125 carriages from the 125 Group, with power cars provided by Rail Adventure. This is a rare opportunity to sample a High Speed Train to and from London Marylebone. Upon arrival at Marylebone, there will be festivities ongoing at the station as part of the 125th anniversary celebrations. You will have around four hours to explore London before the train returns north towards Sheffield just after 3pm.
Timings
The following timings are provisional:
Outward Return Sheffield 06:47 19:55Chesterfield 07:03 19:39Derby 07:23 19:16Leicester 07:49 18:52London Marylebone 10:53 15:21
Train information
Standard Class
These traditional, comfy British Rail coaches are ideal for a day out. Seating in standard class are arranged in a mixture of bays of four and airline seats.
First Class
If you want a little extra luxury, First class is perfect. The coaches feature spacious, well padded seats, and will make your trip that bit more special! For a £50 supplement, a "table for two" can be reserved, giving you a table to yourself - ideal for couples!
Fares
Standard Class (Adult) £95.00 Standard Class (Child) £75.00 First Class (Adult) £143.00 First Class (Child) £133.00
