(1) The 272 Bus will leave the bus station at 0920 on Sunday 12 2015

(2) The South Yorkshire Marathon is also taking place in Sheffield on the same day, Sunday 12 April. The center of town will be closed to all traffic, this means the 272 bus, will not be going on it,s normal route (down Ecclesall road)
I have inquire as to which way the 272 is going to leave Sheffield, but there is no information as yet from the bus company.
As there is going to be a large number of people coming to the center of town, you might need more time to get to the bus station