The metric type "1 - Population - Total resident population (mid year population estimates)" value of <a href="https://derivation.esd.org.uk/?metricType=1&period=cal_2018&area=E09000019&outputType=both&organisationID=&methodType=none" class="derivation-link" target="_blank">239,100</a> for area Islington (London borough) for 2018 has a difference of 2 % from the value of <a href="https://derivation.esd.org.uk/?metricType=1&period=cal_2017&area=E09000019&outputType=both&organisationID=&methodType=none" class="derivation-link" target="_blank">235,000</a> for 2017.