Britain's top share index rose on Monday, boosted by the reopening of banks in Greece and positive broker comments about HSBC and Sports Direct, Reuters reported . The blue-chip FTSE 100 index was up 0.3 percent at 6,796.21 points by 0805 GMT after falling in the previous session. Shares in HSBC rose 1 percent to 585 pence, adding the most points to the FTSE 100 index, after Citigroup raised its rating on the stock to "buy" from "neutral" and increased its price target to 635 pence from 625 pence.