After my mishap a couple of weeks ago, I found a local firm that specialises in repairing plastic bumper scuffs and dents, PDR, upholstery and interior trim repairs.
I got a quote from the local Chips Away guy, who said he could improve the appearance of the damaged area but it would still be visible. The cost? £150 including VAT.
The firm that did the repair charged me £90 including VAT and they did an excellent job - now that it's been repaired, you'd not know it had ever been damaged, so RESULT!

Unlike Chips Away, who would have done the repair outside, the guys that did the repair also have a fully equipped workshop and they charged me £60 less for a far superior job which was carried out in purpose built premises. I'm really chuffed and my car is looking good again.
They were surprised though when I asked them not to clean my car after they'd completed the repair; I didn't want to risk the paintwork being inflicted with swirls!