UHF 7MHz DVB-T services are the least common, 8MHz as we have here the most common. Infact pretty much all historic PAL countries except Australia used 8MHz in the UHF band and typically 7MHz in the VHF band, Australia uses 7MHz for both and that follows through to their DVB-T services, as do most countries where the move to DVB-T kept the existing Analog channel raster.