As an alternative, you can just send the MKV file to a USB stick, then insert that stick into the USB port of your Blu Ray player. I’ve been doing that for years.
Beware: some Blu Ray players will not play the DTS audio tracks, like my LG model.
Yeah I could do that cheers mate, I will have to check it out as I also have an LG model.
Cheers for the suggestion.