VRN
Pretty sad your Tour Operator couldn't tell you what their service offers.
BMR don't do BOB so if you ask the hostess nicely she'll gladly give you a G&T or two!
Catering will be snack style in line with current Scheduled operations so expect a small pasta salad or sandwich on the outbound and a repeat on the return or possibly an afternoon tea depending what's in stock!
Enjoy your flight(s).