646M confirmed perm together with 1837Y. Only 2 buses on 284
now. 1837Y does 191 at midday while 646M does 200 AM Xover. BOTH do
full day.
1854Y 829C 783A confirmed on 95. replace erm 1734K 1744G
1723S
1812T confirmed out of 95, suspect 1842G or 1881T replacing
it.
1874P confirmed on 200.
As for what buses 96 get, u see JB mk3s everyday 
And it seems like 285 fleet is 2611A, 823T, 742T, replacing all the
mk2s.