Hi Paul
It looks like there is an issue with both freesat and Sky Bouquets in the latest build (HTS Tvheadend 4.2.8-17~gd64d8c808), I tried my Pi with Ubuntu Server 18, that showed no Bouquets, I created an Ubuntu Server 18 VM and again that does not see any Bouquets being added automatically.
I loaded Libreelec 8.2.5 on the Pi as that has an older TVHeadend build (HTS Tvheadend 4.2.6-7 ~ LibreELEC Tvh-addon v8.2.113) and that works fine. e.g. this from log when first scanning Muxes it picks, up both Sky and Freesat Bouquets;
2019-03-09 13:29:20.642 [ INFO] mpegts: 11307V in DVB-S Network - tuning on SAT>IP DVB-S Tuner #3 (192.168.x.xx)
2019-03-09 13:29:20.642 [ INFO] epggrab: 11307V in DVB-S Network - registering mux for OTA EPG
2019-03-09 13:29:20.715 [ INFO] subscription: 000C: "scan" subscribing to mux "11307V", weight: 5, adapter: "SAT>IP DVB-S Tuner #3 (192.168.x.xx)", network: "DVB-S Network", service: "Raw PID Subscription"
2019-03-09 13:29:26.590 [ INFO] bouquet: new bouquet 'BSkyB Bouquet 4 - DTH Other: Republic of Ireland'
2019-03-09 13:29:26.590 [ INFO] bouquet: new bouquet 'BSkyB Bouquet 4 - DTH Other: Channel Isles'
2019-03-09 13:29:26.590 [ INFO] bouquet: new bouquet 'BSkyB Bouquet 4 - DTH Other: Northern Ireland'
2019-03-09 13:29:26.590 [ INFO] bouquet: new bouquet 'BSkyB Bouquet 4 - DTH Other: Region 32'
2019-03-09 13:29:26.590 [ INFO] bouquet: new bouquet 'BSkyB Bouquet 12 - Commercial O: Republic of Ireland'
......
2019-03-09 13:38:50.299 [ INFO] mpegts: 12441V in DVB-S Network - tuning on SAT>IP DVB-S Tuner #4 (192.168.x.xx)
2019-03-09 13:38:50.299 [ INFO] epggrab: 12441V in DVB-S Network - registering mux for OTA EPG
2019-03-09 13:38:50.309 [ INFO] subscription: 00DE: "scan" subscribing to mux "12441V", weight: 5, adapter: "SAT>IP DVB-S Tuner #4 (192.168.x.xx)", network: "DVB-S Network", service: "Raw PID Subscription"
2019-03-09 13:38:52.720 [ INFO] bouquet: new bouquet 'England G2: -'
2019-03-09 13:38:52.720 [ INFO] bouquet: new bouquet 'England G2: Default'
2019-03-09 13:38:52.720 [ INFO] bouquet: new bouquet 'England G2: Isle of Man'
.....
I had a quick look at the Issues tracker and could only see Bouquet issues relating to importing from external files so this has not yet been reported, will you raise the issue?
Regards
Mark