Technically it is correct in its geography but it does confuse the reader by quoting other facts about Middlesbrough as a Town
TS1 covers nearly all the Town from the railway line to north boundary of Albert Park - the residential properties are very much Victorian 2 up 2 down terraced houses.
On Teesside there is some good value in some reasonable places to live for example I have seen some good quality 2 bed spacious flats advertised in Guisborough with asking prices of £125k say could be bought for £120k - you are 1 mile outside the National Park and another mile and you are up in the Hills, 2 miles to the Moors. Its 4 miles to Saltburn and the Coast. The town is not quite what it was, but its not TS1.