Soldato
People who don't know what merge in turn means really annoy me. Not so much because of their ignorance of the fact, but because of the attitude they have towards you because they don't understand how it works 
Highway code:
And as already quoted previously:

Highway code:
Road Works: 288
Where lanes are restricted due to road works, merge in turn (see Rule 134)
And as already quoted previously:
Lane discipline: 134
You should follow the signs and road markings and get into the lane as directed. In congested road conditions do not change lanes unnecessarily. Merging in turn is recommended but only if safe and appropriate when vehicles are travelling at a very low speed, e.g. when approaching road works or a road traffic incident. It is not recommended at high speed.
