nrf52833 on micro:bit v2 programming in C/C++

Has anybody had any success at programming the new BBC microb:bit V2 which has a nrf52833 device and a CMSIS:DAP interface, from Keil?

My intention was to try and get a BLE Mesh network demo but I'm not having much luck. I've tried creating a very simple project in Keil and can't even reach my main function in the simulator never mind programming the actual device.  The only success I've had a programming was using the Lancaster University microbit-v2-samples from Github but there are no BLE examples included. I've also tried a port on Zephyr without success and had no luck with MBed Studio. Has anybody got any working C/C++ projects for the microbit:v2 in Keil, Mbed studio / Zephyr that they could share, ideally with BLE? However something, anything that could compile the programme the board from Keil would be useful.

Many thanks

J