UPDATE 3-Cricket-Proteas build lead after Bairstow lifts England

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* South Africa lead by 139 in final test

* England claim three late wickets

* Bairstow misses out on maiden ton

LONDON, Aug 18 - Jonny Bairstow fell five runs short of a

maiden test century on Saturday before South Africa took their

lead in the match to 139 at the end of day three of the third

and final test against England at Lord's.

South Africa closed on 145 for three after England claimed

the wickets of Proteas captain Graeme Smith (23) and fellow

opener Alviro Petersen (24) after tea, and the key scalp of

Jacques Kallis (31) late on.

"It was fantastic (to get Kallis at the end)," Bairstow told

reporters. "We were toiling hard all afternoon so to come away

with that important wicket was fantastic.

"It's pretty level now. There's two days to go and a lot of

cricket left. If we can get a few early wickets we will be

looking to chase down whatever they set us."

Kallis showed dissent at his reviewed dismissal for the

second time in the match. Hashim Amla was 57 not out and

night-watchman Dale Steyn had yet to score.

Amla was dropped on two when he gloved Stuart Broad down the

leg side, but although wicketkeeper Matt Prior managed to get a

full glove on the ball, he couldn't hold on. The wicket of

Kallis, though, would have buoyed England late on.

"If someone said at the start of the series that we would be

1-0 up and 150 ahead with two days left, we would have taken

that," South Africa's assistant coach Russell Domingo said.

"We think we are in a good position tonight. If we can score

another 80 or 90 runs in the morning, that will put England

under some pressure."

England, who must win the match to square the series and

prevent South Africa leapfrogging them at the top of the world

rankings, were dismissed for 315 shortly after lunch.

CAUTIOUS START

Bairstow made a fighting 95 and Graeme Swann added a vital

37 not out at the end to give England a modest first innings

lead of six runs.

South Africa started their second innings cautiously,

reaching 33 without loss at tea off 15 overs. But Swann struck

not long after, when Smith attempted to sweep the off-spinner

and was adjudged leg before after failing to make contact.

That was 46 for one, and it was soon to be 50 for two.

Petersen fell two balls after Amla was dropped, when Broad

trapped him lbw. Like Smith, he chose not to review the

dismissal and replays showed it to be the right decision, as the

ball would have struck leg stump.

Kallis and Amla put on 81 and were solid for the most part,

ominously so for England, who would have well remembered their

third-wicket partnership of 377 at The Oval in the first test,

when South Africa won by an innings and 12 runs.

But the duo was separated when Kallis was lbw to Steven

Finn. Kallis instantly called for a review, giving the

impression he had hit it, but hotspot and regular replays did

not show evidence to support the batsman's protest. He walked

off visibly annoyed and shaking his head.

Bairstow, in the England side for the omitted Kevin

Pietersen, was bowled by Morne Morkel trying to drive through

mid-on. It was a courageous effort by the 22-year-old after

coming to the crease at 54 for four, and he received a warm

standing ovation by the capacity crowd.

Bairstow's innings of just over five hours came to an end

after mounting pressure took its toll. He failed to score from

15 balls off Morkel before he perished. His stand of 124 with

Ian Bell the day before, though, kept England in the match.

"I was pleased with the way I played but pretty disappointed

not to get there," Bairstow said. "It was quite a tense period

of play when I went in so it was pleasing to ride that out with

Ian Bell."

Fast bowlers Morkel (four for 80) and Dale Steyn (four for

94) did most of the damage for the tourists.

(Editing by Stephen Wood)