Mike Williamson has completed his expected departure from Watford and joined Portsmouth in a deal which could land the Hornets as much as £3m.

The fee is undisclosed but the Watford Observer understands the defender will cost Pompey an initial £2m, rising to £3m after add ons and that Watford have a 30 per cent sell on clause.

The 25-year-old signed from Wycombe Wanderers in January for around £150,000 and although the Buckinghamshire-club have a sell on clause of around 25 per cent, the Hornets have still made a huge profit on the centre half.

Williamson has been one of Watford’s star players since joining seven months ago but after Pompey had an initial bid turned down on Thursday, the former Southampton man handed in a written transfer request.

This was rejected by the Hornets and on Friday Williamson declared himself “unfit” to travel to Wales and face Swansea.

This led to criticism from Malky Mackay and it only seemed a matter of time until Williamson reunited with former Hornet Tommy Smith, who completed his own move on Thursday.

< To read Mackay’s views on Williamson’s behaviour prior to move.

To read Watford’s announcement, click here.

For Portsmouth’s announcement.