<a href="https://en.wikipedia.org/wiki/National_Express_West_Midlands" class="extiw" title="en:National Express West Midlands">National Express West Midlands</a> 1507 (P507 KOX), a <a href="https://en.wikipedia.org/wiki/Volvo_B10L" class="extiw" title="en:Volvo B10L">Volvo B10L</a>/<a href="https://en.wikipedia.org/wiki/Walter_Alexander_Coachbuilders" class="extiw" title="en:Walter Alexander Coachbuilders">Alexander</a> Ultra, in The Priory Queensway, <a href="https://en.wikipedia.org/wiki/Birmingham" class="extiw" title="en:Birmingham">Birmingham</a> city centre, on route 3. This bus was one of a batch of 14-Volvo B10Ls that were delivered to the company. They were gas powered at the time, and came alongside 80 conventional diesel powered B10Ls with Wright Liberator bodywork. All of the gas powered buses have now been converted to run on diesel, including 1507 when seen here.
<a href="//commons.wikimedia.org/wiki/User:Arriva436" title="User:Arriva436">Arriva436</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>