I saw that this video was recorded on 12th April! I was there in Liverpool the exact same day for the exact same reason… to spot 507s while I had the chance. I took 507029 to New Brighton too, as did I take 507007 to Ellesmere Port and back, but my main goal was to see 507001! The fact that 507001 was there and I never saw it just saddens me, as it was my main goal. Hopefully I will be back to see 507001 soon… that is if they’re still here.