ARCHAEOLOGISTS are to excavate the site of the new riverside transport museum on the banks of the Clyde in search of artefacts left by the area's first inhabitants more than 1500 years ago.

The appointment of experts to examine the site's history comes as the preparation for the museum extends down to the original ground level.

But it is the more recent industrial past that is causing the developer, Glasgow City Council, most problems and has already brought costs in at £450,000 more than should be the case at this stage.

The museum, originally costed at £50m before rising by 50% last year, has now been given a total "expenditure forecast" of £85m.

Progress will be detailed to councillors in a report released this week.

With the site having been intensively developed over the past 200 years, a large number of foundations of previous buildings occupy the site and other ground obstructions have had to be removed at an additional cost of £265,000.

It is a planning condition to appoint a site archaeologist if the excavation works extend to the original ground level.

Archaeologists recently dug a section of the proposed M74 extension, cutting through Glasgow's south side, uncovering relics from the industrial revolution.

The entire riverside museum project is expected to be complete by March 2011.