UK's Raspberry Pi rises as annual earnings beat estimates
** Shares of single-board computing company Raspberry Pi RPI.L up 19% at 347.8p, top gainers in FTSE 250 index .FTMC ** Co posts better-than-expected rise in annual adjusted core earnings, helped by strengthening demand and favourable unit economics in second half ** RPI stock has risen about 16%, YTD (Reporting by Yamini Kalia in Bengaluru) ((Yamini.Kalia@thomsonreuters.com))