UPDATE 2-Britvic to beat year view as summer sales sparkle

* "Particularly strong" trading in Q3 and into Q4

* Total revenues up 5.9 percent to 249 million pounds

* Analysts upgrade earnings forecasts

* Ireland sales volumes down 20 percent

* Shares up 3.1 percent

(Adds analyst comment, shares)

By Matt Scuffham

LONDON, July 14 (Reuters) - British soft drinks maker Britvic (BVIC.L) said full-year profit should beat market forecasts as it benefited from good summer weather and market share gains, sending its shares higher on Tuesday.

Britain's second biggest soft drinks maker behind Coca-Cola Enterprises (CCE.N) said it had seen particularly strong trading in its third quarter and into its fourth quarter.