I understand that it is not easy to change runway during busy times, but also understand that the pilots have their own set of limitations to apply depending on the type of aircraft. Go-arouds will therefor happen if the conditions are outside these limits.
Typically we can accept a 10-15 knot tailwind for landing depending on flap and weight considerations. For take-off 10 knots max when dry and NO tailwind when wet.
The above is a rough guide BUT ONE SHOULD ALWAYS ATTEMPT TO T/O AND LAND INTO WIND. Not all aircraft has the facility to indicate head/tail wind on final approuch. When cleared to land, please indicate tailwind conditions if it does exist instead of light and variable.
Shoot!