** TSB, which was carved out of Lloyds,enjoys biggest one-day pct move since listing followingpreliminary offer from Spain's Banco Sabadell
** Stock jumps almost 27 pct, adding some $534 mln to TSB'smarket value; trades around 28 pct above 260p IPO price
** Heavy activity in the stock with about $30 mln tradedaccounting for more than 12 pct of the total turnover across theFTSE 250 index of UK midcaps
** Lloyds still owns a 50 pct stake in TSB, Britain'sseventh-biggest bank. Lloyds shares up 1.9 pct
** If the Spanish bank were to purchase a stake of over 29.9pct it would have to make a formal bid for the entire businessunder London Stock Exchange rules
** Shares in Spain's Sabadell down 7.5% before beingsuspended
** Spanish bank to fund entire takeover with share issue andexcess capital, source tells Reuters (RM: tricia.wright1.thomsonreuters.com@reuters.net)