UPDATE 1-AMEC buys UK consultancy Entec for initial 61.2 mln stg

* Says deal to boost presence in water and energy sectors

* Expects deal to add to earnings immediately

* Shares up 1 pct (Adds details)

March 30 (Reuters) - British oil services and engineering group AMEC Plc (AMEC.L) said it acquired environmental and engineering consultancy Entec Holdings Ltd for an initial consideration of 61.2 million pounds ($91.67 million) in cash.

FTSE 100-listed AMEC said the acquisition was expected to add to earnings effective immediately.

"Entec broadens the earth & environmental division's geographic footprint in Europe and it also strengthens its capabilities in the water and energy sectors," AMEC said in a statement.

AMEC, which has 22,000 engineers in 40 countries and is part of the consortium running Britain's Sellafield nuclear facility, said in December it would ramp up acquisitions under its new plan to more than double earnings per share by 2015. [ID:nGEE5B21ES]

Shares of AMEC were up 7 pence at 773 pence at 0705 GMT on Tuesday on the London Stock Exchange. ($1=.6676 POUND) (Reporting by Anirban Sen in Bangalore; Editing by Vinu Pilakkott)