The delivery test aims to measure how effectively each local authority is delivering housing. It works by comparing each councils' level of housing delivery - using the the net additional dwelling figures - over a three-year period to the total number of homes required.
The first test results for the 2015-18 period were published in February - three months late - and the second, covering 2016-19, were due last month. However, they have been postponed, the housing ministry told Planning last month, until after the general election.
Ahead of the government's release of the official 2019 test figures, Planning carried out its own research to estimate what the results might be. More details on our methodology can be found here.
We found that this year, 112 authorities - or 34 per cent - scored under 95 per cent and seem set to face a penalty under the test, which means they will have to at minimum produce an action plan showing how they will improve their housing delivery performance over the next year. These include eight that we predict will come under 45 per cent and therefore face the most severe penalty, the presumption in favour of sustainable development.
We also estimated the 20 authorities that would show the greatest improvement in their score results under the 2019 test, compared to their official results for 2018, published in February.
We excluded those councils whose housing requirements over the three years would be less than 1,000 homes (see table below).
We found that Lichfield District Council in Staffordshire showed the greatest score improvement, with an estimated score of 160 per cent for 2019, compared to 102 per cent for 2018 - an improvement of 58 percentage points.
Meanwhile, Salford Council, in second place, showed an improvement of 51 percentage points, while Cheshire East Council in third improved by 45 percentage points, our research found.
Full details from our study of all the 112 councils' estimated housing requirement and delivery figures can be found here.