At the end of the second world war, with housing having been destroyed by bombing and an influx of demobbed troops returning from the front line, Britain faced a housing crisis. The solution was a building programme. Prefab housing was constructed in a factory, often repurposed aircraft factories, and then assembled on site and was quick, cheap and temporary with an intended lifespan of 10-15 years.
In Ipswich, "Tarran" bungalows were built with a wood and concrete panel construction. The manufacturers were Tarran Industries of Hull who had previously supplied prefab buildings to the War Department.
Despite the intention that these buildings would be temporary, over 70 years later, 127 prefabs remain in the Inverness Road area of Ipswich. They are popular with their residents who have fought off attempts to demolish and regenerate the area.
If you want to see all the prefabs, I suggest starting at the listed coordinates, walking down Inverness Road, turn right onto Humber Doucy Lane and then turn right again onto Sidegate Lane and back to where you started. It is a short walk and the cache is a short detour off this route.
The cache may not be suitable for dogs or children due to the final location being next to a road with limited pavement space, but do use your own judgement.
To find the cache, at the listed coordinates, you should see a red item of a similar vintage to the prefabs. Look for a number in the format IPa bcdeD. The cache can be found at:
N52 a.c(e-b)(e-d) E001 bb.a(e-b)d