PerthBox

I saw one in battenberg in Derby last year but didn't manage to take a photo.

The "all orange" policy was implemented in 2008. The white/blue hard hat distinction and mandatory wearing trackside came earlier in 2005. Mini vests were disallowed in 2009.

One of my other interests is Cold War civil defence. In the really excellent book Burlington by Nick Catford there are three photos of the four JVS12 generator sets which were used for standby power at the formerly top secret Corsham Central Government War Headquarters (the 'Burlington' of the title), located in Spring Quarry Corsham next to Box Tunnel. The book notes that the generator sets were installed and commissioned in winter 1961. It doesn't specify where they came from but I think 61 would be a bit early for secondhand units ex class 30 to be available?

No trains are allowed to pass in the High Spans and this restriction is hard wired into the interlocking. There are no restrictions on the bridge outwith the High Spans. As for the Usan - Montrose section, you have to bear in mind that the section between Abroath and Montrose was opened as a single line and doubled in two stages (Arbroath - Inverkeilor and Inverkeilor - Usan) as a 'make work' scheme during the great depression. The deep granite cutting and viaducts on the Southern approach to Montrose make doubling extremely challenging. Transport Scotland has recently ruled out doubling the section as part of the "Cities Deal" scheme and has instead asked Network Rail to examine other enhancements on the Dundee - Aberdeen corridor, which is likely to amount to resignalling and a few new 650m loops for freight.

The former Perth Signal Section Manager's BR Mk2 Astravan is still going strong, you see it about town from time to time. Can't remember the reg off the top of my head now though. One of the former Railtrack Ops white Mk3 Astravans is still alive and well in Perth too, owned by its long-time driver who bought it from the leasing company.

After a brief flirtation with VW Amaroks, the Ford Ranger is now the Network Rail 4x4 of choice. They've not been without their troubles.

Interestingly the livery on that is different from the livery on the HiLuxes in my area - our ones have unbroken battenberg with the NR logo and the Response Unit lettering underneath. The tailgate chevrons on ours are much smaller and use flourescent Saturn Yellow. This vintage of vehicle was generally owned outright rather than leased and typically used local garages to fit out the back and do the vinyls; I do have an electronic copy of the NR road fleet livery specs but can't locate it at the moment. They're back to leasing again these days and the livery application is much more consistent.