Shares in TSB edged ahead as the bank revealed a profits lift and hailed an above-target performance in the current account market.
Tesco shares fell to their lowest level in more than 11 years on Friday after the retailer's credit rating was downgraded and news emerged that an institutional shareholder had sold off his stake.
Britain's number two and three drugmakers burnished their strength as independent companies on Friday when Shire reported record quarterly results and AstraZeneca won backing for an important new cancer drug.
Tennent's Lager owner C&C Group has seen its share price tumble by more than 10 per cent as investors responded to its takeover approach for Spirit Pub Company.
Construction group Morgan Sindall's shares plunged more than 13pc after it issued a profit warning because of a fire at a carbon-neutral research lab it was building and delays and cost over-runs in other projects.