I've replaced the remaining red and white crash barriers with modern silver ones, so the entire circuit is now edged with silver barriers that give just that extra bit of width of clearance for wider cars and trucks. I also printed out 100 adverts onto self-adhesive paper and stuck them onto every visible face of the barriers around the circuit.
You might have spotted in the photo that the background scenic view has gone. It had started to ripple a little bit from the damp in the loft after the rain the week before last, so it is now being plastic laminated. Should be back in place later this week.