Figures from NHS England reveal paramedics took an average of nearly 10 minutes to get to those patients deemed to be the most life-threatening during March - the national target time is 7 minutes.
Across the UK the average response time was 8 minutes and 22 seconds.
However, South Western Ambulance Service Trust improved on its figures from the end of last year when paramedics took more than 10 minutes to get to the most serious cases.
Storm overflow prevention work set for Plymouth
But it will take five years
Help needed to find Exminster pensioner
Concerns for Charles Fulton, 74
City lose at home again
Kyle Wooton brace gives Stockport win over sorry Exeter
Calls for inclusion on Plymouth lord mayor role
It traditionally alternates between Conservative and Labour
Upgrades to Plymouth storm overflows to take place
Hoe bathing waters are priority to stop sewage discharges
