The FTSE AIM All Share Index is up by 0.3 percent in mid-sessiontrade, slightly outperforming a 0.1 percent gain on the blue-chip FTSE 100 index while the FTSE 250 mid-cap index also advances 0.3 percent.
The FTSE Small Caps Index gains 0.1 percent.
Finnish nickel miner Talvivaara's London-listed shares soar 70.5 percent higher after Talvivaara's parent company starts acourt-supervised restructuring aimed at avoiding bankruptcy.
Property letting franchisee Belvoir Lettings edges up by 2.8percent after announcing the acquisition of lettings portfolios in the Cheshireand Merseyside areas of north-west England.
Environmental services company Water Intelligence slips 3.2percent lower after raising a gross amount of 400,000 pounds through a shareplacing.
Reuters messaging rm://sudip.kargupta.thomsonreuters.com@reuters.net