St George's University Hospitals Trust was caring for 44 coronavirus patients in hospital as of Wednesday, figures show.
NHS England data shows the number of people being treated in hospital for Covid-19 by 8am on January 18 was down from 59 on the same day the previous week.
There were 51 beds occupied by Covid-19 patients four weeks ago in St George's University Hospitals NHS Foundation Trust.
Across England there were 6,299 people in hospital with Covid as of January 18, with 146 of them in mechanical ventilation beds.
The number of Covid-19 patients hospitalised nationally has decreased by 27% in the last four weeks, while the number on mechanical ventilators has decreased by 16%.
The figures also show that 18 new Covid patients were admitted to hospital in St George's University Hospitals NHS Foundation Trust in the week to January 16. This was down from 30 in the previous seven days.