* Oils rally after recent sector earnings reports
* Miners higher; copper price rises
* Banks down on profit-taking ahead of stress tests
* Trade moribund with European markets shut
By Jon Hopkins
LONDON, May 1 (Reuters) - Britain's top shares were flat at midday on Friday, treading water in very thin trade after sharp gains in the previous two sessions, with rallies by oils and miners countering profit-taking in banks and defensives.
With other European markets closed for a holiday, the FTSE 100 <
> index was 4.54 points, or 0.1 percent, lower at 4,240.17 at 1107 GMT, after gaining 1.3 percent on Thursday to post its biggest monthly percentage rise since 2003.The pan-European FTSEurofirst 300 <
> index was flat with only its UK components being traded.Major continental European markets were closed for the May Day holiday, while the UK shuts for a bank holiday on Monday.
"The London market has managed to come back to an even keel from initial calls for a softer day," said Manus Cranny, senior market commentator for MF Global Spreads.
"The brave have a strong belief that Swine Flu is all but a nasty cold that is unlikely to decimate the market, although that can turn on a dime."
"With the sun shinning and a scorcher of a May bank holiday on the way there is little or no interest in playing with volume today," Cranny added.
Oil issues were firmer after a week of above-forecast quarterly earnings, although crude prices eased <CLc1>. BP <BP.L>, Royal Dutch Shell <RDSa.L>, BG Group <BG.L>, Tullow Oil <TLW.L> and Cairn Energy <CNE.L> gained 0.8 to 2.2 percent.
Miners moved higher as metal prices firmed, with copper <MC3> rising more than 2 percent to hit one-week highs on Friday. Kazakhmys <KAZ.L>, Vedanta Resources <VED.L>, Antofagasta <ANTO.L>, Eurasian Natural Resources <ENRC.L>, and Xstrata <XTA.L> added between 2.6 and 5.6 percent.
Platinum miner Lonmin <LMI.L> took on 2.4 percent helped as well by an Investec upgrade to "hold" from "sell".
A broker upgrade also provided a lift for BAE Systems <BAES.L>, up 1.9 percent as Morgan Stanley raised its stance to "overweight" from "equal-weight".
SLOWER CONTRACTION
Britain's manufacturing sector contracted at its slowest pace in 8 months in April, as the weak pound helped support new orders, a survey showed on Friday.
The CIPS/Markit manufacturing purchasing managers' index improved to 42.9 in April from an upwardly revised 39.5 in March. Analysts had expected a more modest improvement to 40.0.
"This is a major gauge for economists and back-to-back positive results will reignite talk of 'green shoots'. It would be unwise to read too much into this, but the figures are at least going in the right direction which is something we haven't had for a while," said Rob Pike, head of trading at ShortsandLongs.com.
Banks took the most points off the FTSE 100 index, reversing some of their recent recovery on profit-taking ahead of the U.S. stress test results due next week and after further criticism of the industry in a UK Treasury Select Committee report.
Barclays <BARC.L>, one of the biggest gainers this week, lost 3.1 percent, HSBC <HSBA.L>, Standard Chartered <STAN.L> and Lloyds Banking Group <LLOY.L> fell between 0.5 and 3.1 percent.
Lloyds said its top executive would get no salary increase this year, and could be forced to repay any bonuses they receive. [
]Royal Bank of Scotland <RBS.L> bucked the downward trend, however, adding 1.9 percent having lagged the sector rally.
Tobacco stocks were also a drag as recent defensive attractions faded, with Imperial Tobacco <IMT.L> and British American Tobacco <BATS.L> losing 2.1 and 1.3 percent respectively.
Drug majors also fell, with AstraZeneca <AZN.L> shedding 1.3 percent and GlaxoSmithKline <GSK.L> falling 0.5 percent.
Travel issues suffered again from Swine Flu concerns again with Intercontinental Hotels <IHG.L> down 2.5 percent, while tour operators Thomas Cook Group <TCG.L> and TUI Travel <TT.L> lost 0.3 and 0.7 percent, respectively.
Mexico started to shut down parts of its economy to slow the spread of the new flu strain as more cases were found in the United States and officials urged increased precautions against an imminent pandemic.
(For more on the flu, double click on [
])(Editing by Simon Jessop)