I've never been to Slough, but from your few succinct words I now know just what kind of place it is. It was bad in Betjeman's day, so I'd hate to see it now.
"Come friendly bombs and fall on Slough, it isn't fit for humans now. There isn't grass to graze a cow".
I think John Betjeman was off the mark slightly. I visited his grave at a small church in the middle of a golf course near Rock on the North coast, beautiful place, another church I like to visit on occasion is the one at St Just in Roseland, Betjeman described it as the most beautiful churchyards in the country, I think he may be right.
His poem about Slough was a protest about urban sprawl, I grew up on one of the surrounding council estates, built in the 50's by the GLC to cope with the overspill from an over populated London, at the time we lived in 'rooms' in a relatives house.
The estates were marvellous, a few thousand houses plus shops, pubs, churches, grammar schools, secondary modern schools, primary schools, doctors and dentists, all new, and available to all, I felt privileged to grow up there.
It's changed, beyond belief really, but it will always have a place in my heart.