and i just done a 3 mile long straight so im knackerd anyway so i need a breather
So the race should be less than 3 miles?
Anyway, just because a load of other cyclists do something, doesn't make it right. It sounds like you'd most benefit from attempting to be more assertive on the road with your positioning. You are part of the traffic, just like the cars. It's a fact of life that they'll overtake you, but you can make them take a wider line around you/give you more respect, just by altering your riding style; whatever the road is like.
So the race should be less than 3 miles?
Anyway, just because a load of other cyclists do something, doesn't make it right. It sounds like you'd most benefit from attempting to be more assertive on the road with your positioning. You are part of the traffic, just like the cars. It's a fact of life that they'll overtake you, but you can make them take a wider line around you/give you more respect, just by altering your riding style; whatever the road is like.