Ashley Barnes' 17th-minute strike sent Albion into the fifth round of the FA Cup today. They deserved their win - and almost went two up when Chris Wood volleyed against the bar on 47 minutes. Here is how a memorable afternoon developed...

Pre-game: Albion make four changes from the side which started the midweek win over Colchester. In come Brezovan, Elphick, Barnes and Sparrow for Ankergren, El-Abd, Kishishev and Bennett. There is a decent reception from away fans for Bennett, who handed in a transfer request on Thursday evening, as the teams come out for the initial warm-up.

1st min: Albion are defending the away end in this first half.

5th min: Painter is penalised for obstructing Buckley on the left edge of the Albion box but the free-kick is cleared.

7th min: It already looks like the pitch is going to cut up easily.

8th min: Very little to report so far. Albion are settling down okay.

  • Last updated after 10mins of 1st half

12th min: Decent build-up by Albion and Calderon sees his 25-yard shot blocked. They are growing in confidence.

15th min: Deeney turns sharply in the box but Elphick gets in a great sliding tackle - and wins the goal kick too.

16th min: Super move by Albion as Murray sends Calderon overlapping down the right. His cross is dangerous and Hodson struggles to divert it for a corner.

17th min - GOAL: The corner is only half cleared, Albion keep the attack alive and BARNES lets fly from around the edge of the box. It's straight at keeper Gilmartin - but he lets the ball through.

  • Watford 0 Albion 1: Last updated after 20mins of 1st half

23rd min: Prolonged Albion passing brings cheers ringing out from the jubilant away end, then it gets a bit more serious as they work Barnes in down the left. He cuts the ball inside towards Wood but this time Gilmartin does well to block the shot and cling on to the ball in the ensuing melee.

30th min: Albion on top as we hit the half-hour. They are knocking the ball around with confidence and Barnes is getting through an awful lot of work in attack.

  • Watford 0 Albion 1: Last updated after 30mins of 1st half

34th min: The floodlights go out - but play continues in daylight and we are told the power will be restarted at half-time.

35th min: Decent again by Albion but Murray's low cross is cleared away from Wood in front of goal.

  • Watford 0 Albion 1: Last updated after 40mins of 1st half

45th min: More danger in the home box but the ball is cleared away from first Wood, then Dicker.

45+2 min - HALF-TIME: Albion deserve their lead.

47th min: Barnes can't quite get his head to a Dicker free-kick at the near post and Wood, right behind him, sees his instinctive volley flick over off the crossbar.

48th min: Gilmartin at full stretch to push the ball away as Calderon gets away on the right of the area.

52nd min: It has been a terrific start to the half by Albion and they could be two up.

54th min: First threat by Watford. They get defender Taylor into a great position in the box but he scuffs his shot straight at Brezovan.

  • Watford 0 Albion 1: Last updated after 10mins of 2nd half

56th min: Watford fans are at last finding their voices and, for the first time, Albion just losing a bit of composure.

58th min: Elphick can only guide the ball off target as a free-kick is whipped into the Watford box.

59th min: Decent sight of goal for Graham on the edge of the Albion box but he pulls his shot well wide.

63rd min: A nice bit of possession football earns applause from the Albion management and suggests the League One side have calmed down a bit.

64th min: Lovely move gets Sparrow in to the right of goal. A poor first touch sends him wide but he chips the ball to the far post where it eventually reaches Painter, who volleys off target.

  • Watford 0 Albion 1: Last updated after 20mins of 2nd half

71st min: Scare for Albion as Brezovan fails to gather a long throw-in but somehow blocks the follow-up shot from Buckley. I'm not sure the keeper knew much about that.

75th min: Graham thumps a shot into the side netting. Home fans thought that was in.

  • Watford 0 Albion 1: Last updated after 30mins of 2nd half

76th min: Nice ball threaded through by Barnes into Wood's run but the striker shoots early and it goes straight to Gilmartin.

81st min: Barnes booked for delaying a Watford throw. Watford send on Weimann for Buckley.

84th min: Albion force a corner and enjoy some territory beneath the gaze of that vibrant away end.

Attendance: 14,519 (3,649 away fans)

85th min: Watford send on Kiernan for Doyley.

  • Watford 0 Albion 1: Last updated after 40mins of 2nd half

89th min: Albion send on Dunk for Sparrow to help cope with an aerial onslaught.

FULL-TIME