What it said about 151e being useless is quite true. its hardly
express. same goes for 74e. more like they are more for "people who
won't mind paying a bit more" for getting a less crowded bus with
less stops.
151A is also not very useful. very few people take it.
but overall, 151 frequency has improved a lot over the last 1-2
years, and with more and more AC buses deployed
Due to the fact that NAC Volvo MK2s are in the midst of phasing out
and progressively replaced by Volvo MK3s and MK4s. Now left with 2
NAC buses (SBS1880X and SBS1893J). They should be gone within these
2 months.
Another good thing is that the new Scania K230UBs are also
introduced on service 151 too.