As for the drive, if it ISN'T either belt or gears then it will be jolly interesting to find out what it is! Photonic drive? Electric transmission like on railway locomotives? Chains? Hydrostatic?
I knew the second after I pressed the Submit key that someone would jump on me for my lack of precision. Does it use belts & gears (similar to the 22/44), or just gears?
presumably it can just drive the gearbox directly, no need for a "clutch"
The RR300 free turbine design almost certainly eliminates the need for a clutch such as found on the 22/44, but even so belts may be used for additional engine speed reduction and/or getting power where it needs to be. OTOH, these functions could be integral with the MR transmission.