Someone found the blog on that precise search term. The arseholes on Nottingham’s City Council have made it very difficult for the average driver with their overdue tram and the resulting speed limit changes.
Within the city ward there is the council’s “blanket 20mph speed limit on urban roads”. Not all urban roads, you understand. No, the morons couldn’t justify making it 20mph on all roads. So you find yourself moving from a 20mph zone, to a 30, then back to a 20 again, all in the space of a few dozen metres. But then you have the boroughs, who haven’t adopted the same policy, and to add to the confusion some areas of those (e.g. West Bridgford, in Rushcliffe Borough) are several miles closer to the city centre than some city areas (e.g. Clifton and Wilford).
Then there is the criminally inaccurate signage. There are still city areas where the original 30mph signs haven’t been taken down, and these stand isolated between the new 20mph signs. Much of the signage is probably illegal or non-enforceable, since it is of the wrong size – the City Council totally underestimated how many signs it would have to erect, and how much that would cost, so as well as the old 30mph signs it couldn’t afford to remove, it also couldn’t afford to replace existing large 20mph signs (where an old 30mph zone changed to 20mph) to smaller ones (now that those 20mph zones are within a larger 20mph zone). This breaches the The Traffic Signs Regulations and General Directions 2002 (TSRGD) legislation.
Beeston and Chilwell are not within the city boundary, and speed limits there vary for reasons other than the incompetence and bloody-mindedness of the City’s Portfolio Holder for Planning and Housing. To answer the question used to find the blog, the speed limit on Chilwell High Street (actually, it’s Chilwell Road at the Beeston end and High Road at the Chilwell end) is 30mph along most of it. However, outside the Clown College for a distance of a couple of hundred metres it is 20mph. There are signs, but they are about half way in size between the big ones and the smaller repeaters, and they aren’t easily visible among the tram ironwork littering the place. At the time of writing they do not appear on Google Earth or Google Maps since the imagery on there was taken while tram construction was still incomplete.*
* It’s still incomplete now, but less so than it was then.