By Jack Barnett Historic profits at oil giant BP nearly pushed London’s FTSE 100 into positive territory today. The capital’s premier index edged 0.06 per cent lower to 7,409.11 points, while the domestically-focused mid-cap FTSE 250 index, which is more aligned with the health of the UK economy, dropped over one per cent to below 20,000 points. Oil mega cap BP this morning said it raked in profits of $8.45bn (£6.9bn) in the three months to June, the highest level in 14 years, sending its shares up nearly three per cent and to the second on the FTSE 100 biggest risers table. The firm was lifte…