Two more technology companies are set to be relegated from the FTSE 100 index of leading UK shares, and replaced by "old economy" firms.

Software firm Logica and microchip company Arm Holdings face being dropped from the FTSE 100 as it undergoes its quarterly reshuffle.

The changes will be based on Tuesday's closing prices, with the two tech companies likely to be joined in the exodus by electrics and industrial parts distributor Electrocomponents.

They look likely to be replaced by metals and chemicals firm Johnson Matthey, food packaging company Bunzl, and Swiss-based mining and metals group Xstrata.

Boom and bust

The changes will be confirmed on Wednesday, and come into effect from 24 June.

If the reshuffle pans out as expected, software company Sage will be the sole tech-only stock in the blue-chip index.

At the height of the technology boom in 2002, there were as many as nine tech stocks in the FTSE 100.

At that time, Logica's share price touched a high of nearly �30 - it stood at 220.5p in early Tuesday trading.

Logica is the global leader in text messaging software, but earlier this year said it would fare worse than expected in this area because of an anticipated decline in Japan.

Xstrata enjoyed a successful flotation on the London Stock Exchange in March, with its issue more than seven times oversubscribed.