Scottish Prison Population Projections: February 2024 Edition

This report presents short-term Scottish prison population projections for the six month period from January to June 2024. They have been produced using ‘microsimulation’ scenario modelling which simulates prison arrivals and departures, and estimates the number of individuals in prison.


5 Microsimulation Model Results: January to June 2024

The latest prison population projections are shown in figure 14 and table 2 below. These indicate that it is most likely that the overall prison population in Scotland will either remain stable or rise slightly between January 2024 and June 2024.

The results also show that it is most likely that the remand population will remain stable, but it could increase or decrease. If it decreases, primarily because of enhanced monthly case conclusions, this could contribute to an increased sentenced population as people transition from remand to the sentenced population. It is projected that the sentenced population will either remain stable or rise slightly; it may rise if the overall rate of transition from remand to the sentenced population increases or if there is a greater inflow of individuals directly from the community to the sentenced population.

Figure 14. Prison population projections for January 2024 to June 2024. Includes 50%, 75% and 95% confidence intervals for all scenario variants given in table 1. The actual population is shown as a series of black points.
A line chart showing prison population projections for January 2024 to June 2024. Includes 50%, 75% and 95% confidence intervals for assumed high, central and low court throughput. A description of the trends is contained in the body text.
Table 2. Prison population projections upper/lower estimates for January to June 2024[27]. These ranges are based on the 95% confidence intervals across all scenario variants given in table 1.

Month

Remand

Sentenced

Total

Average Daily Population by Month - Lower estimate

Average Daily Population by Month - Upper estimate

Average Daily Population by Month - Lower estimate

Average Daily Population by Month - Upper estimate

Average Daily Population by Month - Lower estimate

Average Daily Population by Month - Upper estimate

Jan-24

2,000

2,200

5,700

5,800

7,750

7,900

Feb-24

1,850

2,350

5,600

5,850

7,600

8,000

Mar-24

1,650

2,400

5,600

6,000

7,500

8,050

Apr-24

1,400

2,550

5,600

6,100

7,450

8,150

May-24

1,300

2,650

5,550

6,250

7,400

8,300

Jun-24

1,150

2,800

5,600

6,350

7,350

8,450

The upper total population and upper remand range estimates are from the scenario variant with a low conclusion rate and high remand arrival rate. The lower range estimates for the total and remand populations are from the scenario with a high conclusion rate and a low remand arrival rate. Inclusion of these less likely scenarios for this update has resulted in a larger range than the previous publication. If the new scenario variants featuring higher or lower remand arrivals were removed so the projection only included scenarios featuring central remand arrivals, as in the first publication[28], then in June 2024: the projected average daily total population would be in the range from 7,600 to 8,300; the remand population in the range from 1,450 to 2,600 and the sentenced population in the range from 5,600 to 6,300.

It should be noted that whilst the projections are based on recent trends, they do not explicitly model the impact of potential future policy or operational changes and their potential impact on the prison population.

Contact

Email: justice_analysts@gov.scot

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