Below are some of the main news-driven share price changes at 3.45pm:
RISERS
African Potash (LON:AFPO), up 14.3%. The market gives the thumbs-up to the strengthening of the board, with the latest well-judged recruit being Matt Simmonds, who just happens to be the former Foreign and Commonwealth Minister for Africa.
Sierra Rutile (LON:SRX), up 10.6%. The shares are up as the company hosts a three-day long visit by investment analysts.
Rightster (LON:RSTR), up 8.3%. More well-received board changes, this time from the video content monetisation network. Ashley Mackenzie, the chief executive of recent acquisition Base79, is now to head the whole group.
FALLERS
Global Resources Investment Trust (LON:GRIT), down 17.9%. The shares dipped to 5.75p as the company published its latest net asset value per share, which is 35.56p.
InternetQ (LON:INTQ), down 10.9%. It has not been a good day for Greek technology companies, with Globo's chief executive resigning after admitting fraud, and InternetQ seems to have taken some collateral damage.
Trinity Exploration (LON:TRIN), down 9.0%. The shares fall as the company moves into a new era, with chief executive Joel "Monty" Pemberton resigning from from the Trinidad-focused oil group following the recent sale of its onshore assets.
Below are some of the main news-driven share price changes among FTSE 350 stocks at 1.00pm:
RISERS
National Express (LON:NEX), up 3.9%. RBC Capital upgraded the trains and buses group to 'outperform' from 'sector perform', and has a price target of 310p. Liberum has also upgraded the stock, from 'hold' to 'buy'.
Aberdeen Asset Management (LON:ADN), up 3.5%. Rumours persist that the fund manager is up for sale, despite denials by the company.
Home Retail Group (LON:HOME), up 2.1%. The Argos owner has shrugged off its price target being cut to 100p from 120p by Barclays Capital.
FALLERS
Talktalk Telecom Group (LON:TALK), down 9.2%. The telecoms group said over the weekend that last week's cyber-attack might not have been as severe as first thought, but investors still fear the worst.
Go-Ahead Group (LON:GOG), down 2.8%. The transport firm has been downgraded from 'buy' to 'hold' by Liberum Capital, which now prefers National Express.
WPP (LON:WPP), down 2.2%. The third quarter update did not go down too well, with signs of breakneck growth in Asia Pacific, Latin America, Africa & the Middle East and Central and Eastern Europe coming off the boil.
Below are some of the main news-driven share price changes at 9:00am:
RISERS
Europa Oil & Gas (LON:EOG), up 11.1%. Now that Europa Oil & Gas owns all of the Frontier Exploration Licence 3/13, offshore Ireland, the value potentially attributable to the company for the asset amounts to US$7bn.
SEPLAT Petroleum (LON:SEPL), up 3.9%. The Nigerian energy company said average working interest production for the first nine months of 2015 was up 38% year-on-year.
Plant Impact (LON:PIM), up 3.7%. The crop productivity group saw gross profit virtually double to £3.5mln, while at the pre-tax level it moved into the black for the first time.
FALLERS
Rambler Metals & Mining (LON:RMM), down 5.4%. The company swung to a loss for the 2015 year amid a backdrop of tough commodity markets.
Eden Research (LON:EDEN), down 4.7%. The natural microencapsulation technologies firm has appointed Shore Capital as its nominated adviser (nomad) and sole stockbroker.
Sareum Holdings (LON:SAR), down 3.5%. Full-year results the cancer drug discovery company saw the post-tax loss widen to £1.26mln from £763,000 the year before, though net assets at the end of the financial year had risen to £1.86mln from £1.72mln, of which £1.48mln was cash.