The metric type "1 - Total resident population (rounded)" value of <a href="https://derivation.esd.org.uk/?metricType=1&period=cal_2020&area=E09000019&outputType=both&organisationID=&methodType=none" class="derivation-link" target="_blank">248,100</a> for area Islington (London borough) for 2020 has a difference of 17 % from the value of <a href="https://derivation.esd.org.uk/?metricType=1&period=cal_2019&area=E09000002&outputType=both&organisationID=&methodType=none" class="derivation-link" target="_blank">212,900</a> for 2019.