A quote from "Advanced & Performance Driving by Reg Local
If there is a lane closure ahead, the best approach is to merge-in-turn by which I mean that if you're in the closing lane, you should drive up to the taper (the diagonal line of cones used to close the lane) and then merge in a "zip| fashion with the vehicles in the open lane.
The is a key advantage to merging in turn, in that all the vehicles approaching the roadworks will stay in the lane right up to the lane closure
This means that any tailback caused by the roadworks is kept to a minimum because the slow-moving and stationary vehicles are spread across all available lanes, right up to the roadworks.
There is, however, a major problem margin in turn.
People don't like it.
By which I mean that there is a general misunderstanding about merging in turn which is held by the majority of drivers. It goes against our traditional British propensity for queuing. Those in the open lane feel like those in the closing lane are "pushing in". Some will shake their heads in a disapproving manner. Other will glue themselves to the bumper of the car in front to prevent you from merging in front of them whilst maintaining the "I haven't seen you" straight-ahead stare.
The worse ones (and this particularly includes HGV drivers, who as professional drivers, should know better) will deliberately block the closing lane well ahead of the taper, forcing vehicles to back up behind them and preventing merge-in-turn
Now I'll be honest. I'm very stereotypical British and therefore will queue a little longer than I should do... but this is mainly because the road is full of stupid people who want to block you.