Richard, the TravelXP/FoodXP pair have been confirmed on Sky. Wonder if they'll come to FreeSat. The tuning details are in the RXTVlog article, so like you say there'll likely be a DIY option, assuming it's FTA.
https://www.rxtvlog.com/2019/07/trav...gside-new.html
Can't say I'd heard of FoodXP until you mentioned it.