From 1996 to 2001, a series of translocations took place to try and establish a population of ospreys at Rutland Water. The translocation process takes advantage of natural osprey behaviours

Young ospreys instinctively migrate south to the west coast of Africa. They don't go with their parents. Typically, the adult female leaves once the youngsters are fledged and flying well. Then the adult male continues to provide food at the nest until, one by one, each of the youngsters heads off on migration. The male will leave on his own migration once he's sure the family have all gone.
The youngsters instinctively head south to countries like Senegal and Gambia, where they grow up for the next two years. Typically they start migrating between Africa and Europe every year, once they are 2 years old.
They tend to return to the area where they were fledged. (Males are particularly site faithful. Females are more likely to wander and be persuaded to settle down with a male who has a good territory)
These two behaviours (migrating independently and then returning to where they were fledged) makes it possible to spread the population into new areas. This is done by removing chicks from nests in Scotland when they are old enough to feed themselves on the fish that are delivered by the male, but before they fly and start to imprint on the area where they were hatched.
The translocated chicks are then allowed to fledge from artificial nests at Rutland Water, where they are provided with fish by the project team. They fledge as normal, returning to the nest for food, but imprinting on the release area around Rutland Water. Eventually, instinct takes over and they fly South to grow up.