This should surprise no one who knows anything about physiology, mortality, and morbidity. Mortality and morbidity in generally healthy adults are affected by five things: exercise, tobacco use, alcohol use, diet quality (a high quality diet can be had about a million different ways, veg or non-veg, high carb or low carb, etc., etc.,) and overall caloric intake, and body weight (more specifically, a waist to height ratio of less than 0.50). Four of those five factors have nothing to do with veg vs. meat, and even in the case of the one that does, it does not make physiologic sense that the mere fact of meat ingestion is somehow deadly.
If you want to promote vegetarianism for other reasons, fine. Do so clearly and succinctly. But, the health benefits are slim to none. No pun intended.
Conclusions: United Kingdom–based vegetarians and comparable nonvegetarians have similar all-cause mortality. Differences found for specific causes of death merit further investigation.