I happened to notice someone further down the road getting their front garden done and the van outside was from Ground and Steel.
http://groundandsteel.co.uk/page_3.html
The railings look totally fine but obviously I've got no idea of what they are like as a company to work with, costs etc etc. I wish I were the kind of person that had the balls to knock on their door and ask directly but I'm just not....
We need to get round to doing this as well so I'd also be interested to get a recommendation.