Nickel miner Talvivaara was significantly lower as speculation about last week's gypsum pond leakage at its project in Finland continues to pressure the stock. Speaking overnight to Finnish broadcaster Yle's current affairs programme A-studio, Talvivaara Chief Executive Harri Natunen said that taxpayers will not have to shoulder the clean-up cost at the mine. Shares, at just over the 87p mark this afternoon, are well off the 130p level seen before the leak was first reported at the start of the month. Bank note printer De La Rue fell sharply after saying that while banknote print volumes were up 4.0% to 2.9bn notes in the six months ended September 29th, banknote paper volumes declined 15% to 4,500 tonnes. bwin.party digital entertainment fell after it was forced to confirm that its Chief Executive Officer, Norbert Teufelberger, has agreed to attend an interview with the Belgium authorities. It was reported earlier on Tuesday that the CEO was detained by police during the Responsible Gaming Day conference in Brussels, although naturally the company gave no information regarding this. Telecoms operator TalkTalk soared into the top spot after it said it is on track to return to revenue growth in the full year as half year revenue fell by two per cent to £828m. Regneration specialist St Modwen was also rising after it was reported on Monday that construction on a housing estate it is developing has begun. The company has said that the first houses are expected to come on the market in December. FTSE 250 - RisersTalkTalk Telecom Group (TALK) 214.00p +14.68%St. Modwen Properties (SMP) 206.90p +2.94%JD Sports Fashion (JD.) 756.00p +2.79%Petra Diamonds Ltd.(DI) (PDL) 101.80p +2.47%TUI Travel (TT.) 254.60p +2.41%IP Group (IPO) 108.90p +2.25%Oxford Instruments (OXIG) 1,286.00p +2.23%Diploma (DPLM) 444.40p +2.14%Debenhams (DEB) 120.20p +2.12%Perform Group (PER) 404.40p +1.94%FTSE 250 - FallersTalvivaara Mining Company (TALV) 87.50p -8.62%De La Rue (DLAR) 1,004.00p -5.64%Ultra Electronics Holdings (ULE) 1,522.00p -5.29%Chemring Group (CHG) 221.50p -4.81%New World Resources A Shares (NWR) 245.80p -4.65%Bwin.party Digital Entertainment (BPTY) 113.70p -3.81%Afren (AFR) 134.30p -3.80%Kentz Corporation Ltd. (KENZ) 372.30p -3.77%FirstGroup (FGP) 181.80p -3.55%Petropavlovsk (POG) 362.70p -3.54%NR