Cattermole was found unresponsive in his home in Dorset and was pronounced dead a day later on 6 April.
Police were not treating the death as suspicious although the cause of death was not immediately known.
Cattermole was a founding member of the hit pop group together with Tina Barrett, Jon Lee, Bradley McIntosh, Jo O’Meara, Hannah Spearritt and Rachel Stevens, which sold 10 million albums in the late 90s and early 2000s.
His financial problems were well-known, being declared bankrupt in 2014. To raise money to pay debts, he put up one of his Brit Awards for sale on eBay.
Vaccinated???