The Labour Party has called for the number of people on juries in criminal trials in England and Wales to be cut from 12 to seven in a bid to tackle a backlog of 54,000.
Shadow Justice Secretary David Lammy said: "The justice system is facing its gravest crisis since World War Two, leaving thousands of victims waiting too long to get justice.”
He said: “Victims of rape, murder, domestic abuse, robbery and assault are facing delays of up to four years because of the government’s failure to act.”
Because of social distancing and other measures many courts are out of action and trials are frequently delayed or postponed when jurors, lawyers or defendants contract COVID-19.
During World War Two when the pool of people available for jury service was reduced by soldiers and sailors being away from home, trial juries were reduced from 12 to seven.
But the idea has immediately been shot down by lawyers and law experts.
Derek Sweeting QC, Chair of the Bar Council, said: "Tampering with juries should…be a last resort. It is the collective life experience and diversity of members of a jury that ensures evidence is tested robustly and the public can be confident that justice is delivered fairly."
He added: "Reducing the size of juries risks diluting that experience and denting confidence in our justice system. Even when jury numbers were reduced in wartime (at a time when there were restrictions, which do not exist today, on who could serve on a jury), it was not a blanket reduction. Some cases – murder for example - continued to have 12 person juries, such is the importance of jury trials."
The Ministry of Justice more than 290 extra courtrooms - dubbed Nightingale courts - had been set up to hold COVID-secure jury trials.
The ministry said: "But we know more must be done and are investing 110 million pounds into a range of measures to drive this recovery further, including opening more Nightingale courts." it said.
The legal system in Scotland is different to that in England in Wales.
Scotland - which requires a jury of 15 in criminal trials - has a backlog of over 30,000 cases, up 40 percent since the start of the pandemic.