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* Graphic: Sterling and gilt yields bit.ly/2dgAXn1
* Graphic: World FX rates in 2017 tmsnrt.rs/2egbfVh
* Graphic: Trade-weighted sterling since Brexit vote tmsnrt.rs/2hwV9Hv
By Ritvik Carvalho
LONDON, May 19 (Reuters) - Sterling climbed back towards an eight-month high above $1.30 on Friday against a dollar that was weaker across the board, though some investors were calling a top on the British currency, seeing it as vulnerable to Brexit negotiations.
The pound surged to an eight-month high of $1.3048 after strong retail sales figures on Thursday. It then lost momentum later in the day after what some traders called a mini "flash crash", when the currency lost over a cent of its value in less than a minute.
By 1600 GMT on Friday, though, it had recovered to trade up 0.6 percent on the day at $1.3017.
But strategists said the pound -- which has gained more than 3 percent in the past month on the announcement of a snap UK election -- would find it hard to advance further.
"I would still probably be playing sterling from the short side," said Jeremy Stretch, currency strategist at CIBC World Markets. "Topside is relatively limited from here."
While positioning data shows speculators have reduced record high levels of bets against the pound, reports from major banks this week show big speculative investors and firms still tending to sell the currency whenever it blips higher.
Against a stronger euro, sterling was 0.2 percent down at 85.95 pence.
Investors are betting that a widely expected big win for British Prime Minister Theresa May on June 8 will give her more room for manoeuvre in Brexit talks.
Her ruling Conservative Party is expected to outspend the opposition Labour Party in campaigning, and many of their traditional business backers are opting to stick with them despite concerns over Brexit.
Besides reiterating that no deal with Europe would be better than a bad deal, May's election manifesto pushes back the balancing of the UK budget, a factor ING strategists noted might be giving a "modest lift" to sterling.
"Now the plan is to delay the balancing of the budget to 2025 from 2022, allowing room for fiscal support should Brexit require it", they wrote in a note to clients.
"Also stepping back from the triple-lock on pensions allows more room for spending on other social programmes and should attract the centre-left vote." (Editing by Gareth Jones)