Revenues
rose
28%
on
2011
to
£4.15
billion
($6.44
billion)
for
the
company
last
year,
with
earnings
before
interest
depreciation
and
amortisation
(ebitda)
rising
11%
to
£331
million.
Amec’s
natural
resources
division,
where
oil
and
gas
accounts
for
about
three
quarters
of
earnings,
posted
revenues
up
39%
year-on-year
to
£2.416
billion.
However,
margins
decreased
over
the
year
from
9.2%
to
8%,
and
overall
net
income
decreased
to
£217
million
from
2011's
£232
million.
Amec
said
that
when
non-continuing
operations
were
excluded,
its
net
profit
rose
slightly
to
£212
million
from
2011's
£207
million.
Chief
executive…