As the revamp of Preston’s grade-II listed Bus Station continues eagle-eyed passengers thought they’d spotted a blunder.

Boards on the building site outline where the stands will be for buses and there was no Stand 33.

30,31,32,34 – you’re missing one said many on Twitter.

@blogpreston @PrestonBus surely this is a mistake, what's happened to number 33? pic.twitter.com/vigrmEYpa4

— CarolD (@CarolCouture007) April 25, 2017

However, the changes to the Bus Station mean the external numbering of stands is due to change.

Read more: Which levels and ramps are currently shut at the Bus Station

A spokesman for Lancashire County Council, who are behind the work, said: “Inside the concourse we’re required to retain the original 40 stands, as part of the Listed status, but with fewer external bays to meet modern accessibility standards.

“As a result, a number will be missed out on every sixth external bay to keep them in sync with the internal numbering.

“This won’t affect passengers, as these numbers are only used by drivers arriving at the bus station.”

Read more: Bus Station roof car park is back open after revamp

Plans for the Bus Station submitted in December last year explained how the bays are to be used.

Bus firms have expressed concerns about the reduction in ‘layover spaces’ for busy periods.