Banks led the FTSE 100 index 0.6% higher in early trading to 5,704.96 as investors showed their relief after Ireland agreed an €85bn (£72.5bn) rescue package.
Royal Bank of Scotland rose 3.4% to 40p while Barclays climbed 2.4% to 266.1p, and Lloyds Banking Group was 2.2% higher at 63.21p. Prudential was also up, by 2.8% at 593p.
Among this morning's losers, International Power fell 1.1% to 412.3p after UK energy market regulator Ofgem announced it will review whether the market is working well for consumers.
Autonomy Corporation also dropped, by 1.3% to £13.24, after its inclusion in a list from J.P. Morgan of stocks to avoid in 2011.
Resolution slid 0.9% to 223p after J.P Morgan Chase initiated its coverage of the company with an 'underweight' rating.
BT Group also fell, by 0.5% to 173.3p.
Among mid-caps, Gartmore rose by 2.4% to 105.5p after reports Henderson Group has hired advisers to examine buying the company.
Meanwhile, the euro is up 0.40% against the dollar at $1.3241, although it slipped to $1.3181 in early trading, its lowest level since 21 September.
Overnight, Japan's Nikkei 225 rose by 0.9% to 10,125.99 points, as the good news from Ireland outweighed political tensions on the Korean peninsula.
On Friday, the Dow Jones closed 0.9% lower at 11,092 points.
Two global vehicles
'Further plug advice gap'
Must appoint separate CEOs and boards
Advisers do come out well
Will report to Mark Till