12.04pm: Shane Lowry arrives to the golf course, jumps out of the car and walks in hand-in-hand with daughter Iris, brother, Alan, Brian Moran and Alan Clancy. The breeze is freshening appreciably but the heavy stuff isn't due until 3.0pm.
12.50am: Lowry crosses the bridge on his way to catch a buggy and head for the driving range.
1.29pm: Rickie Fowler pulls his opening tee shot out of bounds and it costs him a double bogey to drop to six under. Amazingly in the very next match another American JB Holmes suffers a similar fate in every respect, out of bounds and a double bogey.
1.32pm: Lee Westwood said on Saturday that no lead is big enough and that there was 100 times more pressure on Lowry. The Englishman misses a two foot putt for par on the first green.
13.42pm: Lowry makes his way to the first tee and receives a huge ovation. Tommy Fleetwood arrives about 20 seconds later and the two share a warm handshake. Fleetwood splits the fairway but Lowry pulls his into the rough.
1.51pm: Koepka (-8) bogeys the first, Willett (-8) birdies the second, Westwood (-9) birdies two and chips in on three for another.
1.59pm: Lowry (-15) holes a six foot putt for bogey having watched Fleetwood (-12) miss from seven feet. The Irishman's lead is three but that could have been a great deal worse.
2.06pm: Lowry's (-15) pursuers continue to falter for the most part, Koepka (-7) opens with a brace of bogeys, Justin Rose (-8) drops a shot at the third and Thomas (-7) at the ninth. Fowler (-8) gets back the two shots with birdies at the second and third.
2.27pm: Fleetwood (-11) had two very good birdie chances on the first and second holes but missed the green at the third and can't get up and down. Lowry's (-15) lead is back to four shots. Fowler (-9) makes three straight birdies after a double bogey at the first. only three players in the last seven groups are under par for their respective rounds.
2.29pm: Koepka and Holmes (-7) are dragging each other into the abyss, a combined seven over par through four holes but an eagle for Koepka at five partially repairs the damage.
2.38pm: Lowry (-16) with a gorgeous four-iron to six feet and he drains it for birdie; Fleetwood's (-11) effort came up two rolls short in the jaws. The Irishman leads by five with 14-holes to go. The rain is now coming down in earnest.
2.47pm: Fleetwood (-12) drives the par four fifth, Lowry comes up 40-yards short of the green but both walk off with a birdie; the Englishman watches his eagle putt dive left. Lowry's six-footer was silky smooth and he retains a five shot lead. Westwood (-10) – his putting has been rank – and Fowler (-9) aside, the rest look too far back.
3.02pm: Gutsy from Fleetwood (-12) he misses the green on the par three sixth but gets up and down.
3.10pm: Graeme McDowell (+4) finishes his final round to a thunderous ovation, an appropriate metaphor given the weather. It is chucking it down.
3.21pm: Lowry (-18) with a third birdie in four holes, shows his short game wizardry once again, as he chips to three feet . Fleetwood (-12) in trouble off the tee shows his mettle by getting up and down from a greenside trap. The Irishman is six ahead with 11 to play.
3.37pm: Fleetwood (-11) and Lowry (-17) both in trouble off the tee, make bogeys on the eighth.
3.57pm: Lowry (-16) with back to back bogeys – level for the front nine – and Fleetwood (-11) closes the gap to five shots as the final group head for the back nine. The chasing pack has disappeared in the gloom. It's a three-way shootout.
4.15pm: A tale of two knee-trembler putts, Lowry (-16) holes a nasty five-footer down the slope, Fleetwood (-10) misses from a couple of inches shorter: six ahead with eight to play. Westwood (-8) is heading in the wrong direction with a bogey on 12.
4.31pm: Lowry (-15) three putts from the 30 feet on 11. Lead back to five.
4.50pm: Make that four, Fleetwood (-11) birdies the par five 12th and Lowry can't..
5.02pm: Both get up and down on 13, Lowry (-15) from the sand, Fleetwood (-11) with a smooth five foot par putt.
5.20pm: The moment? Lowry (-14) bogeys but Fleetwood racks up a double (-9). Lowry's face is a window to his emotions. Caddie Bo Martin makes his player smile and the tension drains away.
5.32pm: Birdie! Lowry (-15) clenches his fist as he rolls in a seven footer on 15; six clear. He played that hole beautifully as he does 16 and 17. No fuss, one hand on the Claret Jug.
5.57pm: Lowry's name is engraved on the band around the Claret Jug while he stands on the 18th tee.
6.09pm: Lowry two putts from the fringe. Arms aloft, he is the British Open champion, the sixth Irishman to win a Major, 10 of them coming in the last 12 years. 'Hon Offaly.