I think that First Greyhound is well known in South Wales and the service 100 that operated between Swansea, Cardiff, Newport and Bristol Airport will continue to operate between Swansea and Cardiff.
The BRS service ran for two years and will cease next month. It operated hourly or two-hourly, depending on time of day, from the early hours until late evening each day. As with most airport buses to BRS loads varied. It was not uncommon to see over 40 getting off or boarding the coach at times in the summer; at other times it would be near empty.
The same applies to the BRS Flyer which is operated by First Bristol for the airport, although this operates up to every nine minutes for most of the day and evening and is a 24-hours service. The A4 Air Decker run by the Bath Bus Company is more like the South Wales service with a similar time spread except that it's every hour all the time. The double deckers are often very lightly loaded but can be quite full on occasions. The £20 return fare between Bath and BRS doesn't need too many passengers to make it pay.
I suspect that the airport is subsidising the new National Express service which apparently will operate 12 times daily. I'm not convinced of its need because with the Flyer virtually an on demand service most of the time to Temple Meads station which is 25 minutes away feeding into First Great Western trains to Cardiff (three an hour) the flexibility is greater. No doubt comparative fare price will be an important factor.
bmi regional
santito - back in the summer of last year monthly average summer load factors on the routes were in the band 55-75%, typically high 60s, low 70s. The LH code share to FRA and MUC had a positive effect on loads, unsurprisingly.
I haven't checked them in any detail this winter but looking at the monthly totals each month they appear to be a bit down on summer. The fares are quite high on most routes if a week in May that I just checked is typical.
Air Passenger Duty
Bristol Airport welcomes opportunity to make case against Air Passenger Duty being devolved to Wales - Wales Online
It's reported that new powers for Wales were outlined by the government today which will include a review of potential options to mitigate impacts of APD devolution on regional airports. There will be a discussion paper published in the summer examining the effects of the devolution and variation of APD rates within England, and the provision of aid for regional airports including Bristol Airport.
It all sounds a bit vague to me and, anyway, a change of government in May might well see a different approach.