You can apply for extension of stay for 2 years instead of ILR on the basis of 10 years long residence if you do not meet the English test or Life in the UK test. An application for extension of stay on the basis of 10 years long residence is submitted to the Home Office UKVI using application form FLR (LR). The application for extension of stay for 2 years on the basis of 10 years long residence can only be submitted using the standard service becuase Priority or Super Priority Service is  not available for FLR (LR) application.