After the onset of COVID-19 many countries’ populations exhibited a significant deterioration in mental health, including high rates of anxiety, depression and psychological distress.1 During the first month of lockdown in the UK, the population showed an 18.9% increase of clinically significant mental distress compared with the incidence in pre-lockdown conditions.2 A consequent study found that people who had self-reported a previous mental health illness had also been more likely to have worse mental health during and following the lockdown period.3 Studies have shown that from the beginning of the lockdown period in the UK until early 2021, there had been a considerable increase in the rate of antidepressant prescribing in primary care, but referrals to and contact with mental health services did not reflect this and instead decreased from the corresponding period in the previous year.4 As such this raises the question of how effectively mental health was being managed during the pandemic and whether this is reflected in the number of admissions in the COVID-19 period. In this context, we wanted to analyse the rate of admissions in old age psychiatry, general adult psychiatry and learning disability units within the Humber Teaching NHS Foundation Trust during pre- and post-COVID-19 periods to see if there was a significant change in admissions because of the COVID-19 pandemic, alongside the out-of-area admissions during the same period, and the cost implications. This service evaluation was prompted by conflicting discussions that were taking place around whether there was an increase or decrease in the number of admissions over the pandemic period. It has been observed that services have been stretched during the pandemic. This service evaluation looked at the impact of COVID-19 on admissions to psychiatric inpatient units, as well as its effect on out-of-area bed stays. We specifically looked at seven different types of units across the Humber region: Avondale (acute assessment); New Bridges (acute and treatment, adult male); Maister Lodge and Mill View Lodge (old age); Westlands (acute and treatment, adult female); psychiatric intensive care unit (PICU); Mill View Court (psychiatric assessment), and Lilac and Willow units (learning disability). Data were collected retrospectively using admission records for each respective unit and out-of-area admissions were specifically highlighted. Quarters 1–4 of 2019–20 were used for the pre-COVID-19 figures, while quarters 1–4 of 2020–21 and quarters 1–3 of 2021–22 were used for the post-COVID-19 figures. Graphical representations of these data sets were produced to demonstrate how COVID-19 and all the subsequent policy changes impacted psychiatric inpatient admissions. The data were analysed using an unpaired t-test, to see whether there was any significant difference between the admissions prior to COVID-19 and post-COVID-19. Out of the five units that had general adult psychiatric patients, only one, Avondale Unit, showed a statistically significant decrease in admissions per quarter during the COVID-19 lockdown – compared with prior to the pandemic, Mill View Court, New Bridges, Westlands and PICU all noticed slight variations in the number of adult admissions. However, none of these variations were found to be statistically significant. The magnitude of admissions to Avondale in comparison with the other units, meant that overall, the data showed a significant decrease in admissions per quarter. Neither of the two units that admitted old age psychiatric patients or psychiatric patients with learning disability pre-COVID and post-COVID pandemic showed a statistically significant change in quarterly admission during this time. When comparing the number of out-of-area admissions prior to and during the COVID-19 pandemic, there was a significant increase in out-of-area admissions per quarter in both adult and older people submissions in the post-COVID-19 data. The comparison was made in looking at averages per quarter pre- and post-COVID-19. When examining the economic implications of the increase in out-of-area bed stays, the current minimum cost per day per bed is £515 with the maximum cost being £849. The average of this would be £682 per day for an out-of-area bed stay. It is almost double the cost compared with inpatient admissions within the Humber Teaching Trust. Therefore, it appears that an increase in number of out-of-area bed stays has had cost implications for the trust(Figure). The cost implications to the Humber NHS Trust are shared by the Hull CCG who fund the patient placement. Prior to COVID-19 the cost of out-of-area placement was picked up by the patient's CCG: Humber NHS Trust had agreed to put operating procedures in place to ensure that local CCGs were aware and approved of any out-of-area placements as and when the need arose. During COVID-19 with the increase in out-of-area placements Humber agreed to contract some beds from both Cygnet and The Priory for a limited time, which was funded from a specific COVID-19 allocation from commissioners. This was part of the national funding allocation response to COVID-19. This study found that psychiatric hospital admissions in the post-COVID-19 period were significantly lower compared with pre-COVID-19 periods only for general adult psychiatry admissions across the Humber Teaching NHS Foundation Trust region, but not in learning disability or old age psychiatry where hospital admission numbers remained constant. However, there was a temporary increase in out-of-area bed stays due to the COVID-19 situation. The UK was placed in the first of many lockdowns during this period.5 Most care homes and respite services were locked down due to the pandemic and they were not able to accept patients from family homes. This resulted in an increased admission rate in hospitals. Additionally, due to COVID-19 outbreaks, some mental health units were closed for admissions, which also resulted in an admission to an out-of-area unit. As a general trend, it was found that over the course of the pandemic women's mental health admissions had been on the increase possibly due to factors such as domestic violence during lockdowns, dealing traumatic events such as miscarriages alone and the loss of the closer support network during pregnancy and childbirth.6 None declared. Thanks to Debby Shaw (Performance Management Advisor) in the Humber Teaching NHS Foundation Trust for her helpful input and support in analysing the data.