LONDON -- With the holiday weekend upon us, investors were in no mood to take up fresh positions, leading to a very quiet trading session for most of the day and a frantic last half hour as players attempted to adjust their book positions.

The

FTSE 100

ended 56.3 points higher, or 0.9%, at 6,241.2 and the

Techmark

index was just 22.3 points lower, or 0.6%, at 3,359.0.

In the tech sector,

Bookham Technology

stole the show with a gain of 312p, or 13.9%, at

24.75 ($39.35) and

BATM Advanced Communications

ended 215p higher, or 5.2%, at

43.30.

The biotech sector returned to prominence with

Cambridge Anitbody

rising 150p, or 7.6%, to

21.12 and

Oxford Glycoscience

up 52p, or 3.0%, to

17.80.

Oil stocks provided a ray of sunshine, with

BP Amoco

(BPA)

regaining favor in the wake of its Atlantic Richfield acquisition, and rising 13p, or 2.5%, to 533.5.

Shell

(SC) - Get Report

closed up 8p, or 1.7%, to 482.

Satisfactory first-quarter results boosted

SmithKline Beecham

(SBH) - Get Report

28p, or 3.3%, to 879, and merger partner

Glaxo Wellcome

(GLX)

closed up 56p, or 2.9%, to

19.58. Make the most of it -- it's the last set of individual results before the merger is set in stone.

Europe's other bourses were mixed, with the

Xetra Dax

in Frankfurt closing down 58.76, or 0.8%, at 7,157.95, but the

CAC 40

in Paris up 68.05, or 1.1%, at 6,234.51.

In Frankfurt, some tech stocks managed to recover after being sold off in the morning.

Siemens

(SMWAY)

closed unchanged at 449.85 euros ($445.35), and

Epcos

(EPC) - Get Report

ended up 0.85 euros, or 0.6%, at 133.85. Software maker

SAP

(SAP) - Get Report

, though, continued to be punished for its disappointing sales figures and the resignation of the head of its U.S, operations Wednesday, and closed down 62.38 euros, or 9.4%, at 600.62.

DaimlerChrysler

(DCX)

was another bid loser, falling 4.35 euros, or 6.4%, at 63.35 after reporting that increased competition in North America had contributed to dragging down its overall profits 3.0% to $2.3 billion during the first quarter of this year.