* FTSE 100 down 0.2 percent; banks biggest fallers
* BP higher as "great makeover begins"
* ICAP, Compass drop after trading updates
* U.S. GDP data eyed; due at 1230 GMT
By Tricia Wright
LONDON, Sept 30 (Reuters) - Britain's FTSE 100 share index <
> was lower by midday on Thursday, with a rise in BP <BP.L> offset by bank stocks falling as investors continue to worry about European government debt.By 1126 GMT, the index was off 11.06 points, or 0.2 percent, at 5,558.21, ending a strong month when it has risen 6.4 percent.
Banks <.FTNMX8350> took the most points off the index, down 1.1 percent and extending Wednesday's sharp losses.
Ireland's central bank has put a 34 billion-euro ($46.2 billion) price on bailing out Anglo Irish Bank [
] under a worst-case scenario and said Allied Irish Banks <ALBK.I> needs to raise an additional 3 billion euros by the end of the year.Moody's Investor Service cut Spain's credit ratings to Aa1 from AAA, with a stable outlook, saying it sees weak economic growth prospects for the euro zone's fourth-biggest economy. [
]"The Spanish downgrade, although expected, together with the concerns over the banking situation in Ireland mean investors remain wary," Mic Mills, head of electronic dealing at ETX Capital, said.
ICAP PRESSURED
ICAP <IAP.L> shed 3.5 percent to top the blue-chip fallers' list as the world's biggest interdealer broker said increased interest costs were holding back earnings growth although it expected higher first-half revenues. [
]Compass Group <CPG.L> fell 2.9 percent after a "disappointing" in-line trading statement, said trader Ben Critchley at IG Index, although brokers remain generally positive on the group's longer-term outlook. [
]On the upside, Burberry <BRBY.L> climbed 0.9 percent after Bernstein issued a broadly positive note on the luxury goods sector. [
]Upbeat broker sentiment also helped Smiths Group <SMIN.L>, up 0.7 percent, with Morgan Stanley hiking its target price for the technology group following full-year results on Wednesday.
BP <BP.L> advanced 1.7 percent as the group continued to benefit from what Evolution Securities called the beginning of a "great makeover" after a shake-up of top management was unveiled on Wednesday. [
]British house prices edged fractionally higher in September, a survey by mortgage lender Nationwide showed, bucking expectations for a third successive monthly decline.
And British consumer confidence weakened more than expected in September as people's outlook on their own finances and the economy as a whole darkened, a GfK/NOP survey showed.
Investors were waiting for the final reading for U.S. Q2 GDP, due at 1230 GMT, although no revision is expected to the 1.6 percent quarter-on-quarter provisional growth number.
Looking at the FTSE from a technical perspective, David Morrison, market strategist at GFT Global said: "(It) is trying to break above 5,625 at the moment ... this really ties in with the resistance on the S&P <.SPX> which is at 1,150, and on the Dow <
> at 10,900.""They're different percentage levels but they're all significant levels of resistance -- you either see this as a loss of momentum to the upside ... or you can see this as a healthy consolidation and stocks now building a platform from where they can push on higher," he said. (Editing by Greg Mahlich)