Mark 2F buffet conversions from FOs also used the modular concept:
- 12xx - RFB seating 26 with original IC70 seats, telephone booth and a small buffet counter, microwave and storage area.
- 67xx - RLO seating 26 with loose lounge seats, telephone booth in place of the luggage rack and a pantry with microwave and storage area. Some had a small bar counter like the 12xx vehicles.
On the West Coast 12 former Mark 3 HST kitchen cars (405xx series), 18 surplus Mark 3A FOs and the original 28 Mark 3A Restaurant Buffet Firsts (RFBs) were all rebuilt as Restaurant Buffet Firsts (Modular) or RFMs. This was to standardise the West a Coast catering fleet dye to the mixed Mark 2/3 fleet that operated with the RFBs, Mark 1 RBRs and Mark 1 Kitchen Buffets (the latter in the Manchester Pullman 3B sets).
The Mark 3A RFBs were essentially the same as the HST TRUBs (403xx)/TRFBs (407xx). One (40719) was rebuilt to trial the Modular catering concept as a TRFM and renumbered 40619. For a number of year some it was used in the Master Cutler set and then shortly before privatisation it became a spare vehicle with CrossCountry due to being non-standard (it was excluded from the kitchen/Buffet rebuild InterCity did on the HST catering vehicles in the early 1990s).