Not at all a conspiracy fail. The very first headline on BBC online after the announcement was actually....
'Labour win Oldham with reduced majority.'
However, this had changed by this morning, so maybe someone in the editorial team responded quickly enough to complaints of bias.
Try checking some other media and see the way it's reported.
Daily Mail report said.....
'Jeremy Corbyn's beleaguered Labour win Oldham with 62%
What a funny way to be beleaguered
The Telegraph said.....
'The lower turn out means Labour's majority increased from 34 to 39 per cent'
.......as a rule, anyone that follows these sorts of things knows that lower turn out would normally mean a reduced majority for an incumbent.
Radio 5 last night, said......
'Corbyn wins with decreased majority'
and then quickly followed with...
'So, I suppose now it is on to the next problem for the Labour party.
There has also been some research done on media bias in the run up to the poll which shows an absolute overwhelming bias against Labour and Corbyn.
Looks like the good people of Oldham were too intelligent to swallow all the propaganda.
Good luck to them!