(For a live blog on European stocks, type LIVE/ in an Eikon news window)
* FTSE 100 up 0.2%, FTSE 250 up 0.4%
* Aston Martin slides on profit alert
* Retailers lead gains on main index
Jan 7 (Reuters) - UK shares rebounded on Tuesday in the absence of any immediate escalation in the Middle East tensions, while a strong Christmas performance update from supermarket group Morrisons lifted the sector.
The FTSE 100 was up 0.2% by 0809 GMT, with gains led by supermarket groups Morrisons and Sainsbury’s .
The killing of a top Iranian military commander by the United States had sparked a selloff on Monday, with both the UK benchmark indexes losing nearly 1%.
Midcaps added 0.4% as Premier Oil shares surged 12% after a deal to buy certain BP assets, more than offsetting an 11% slide in luxury carmarker Aston Martin following a profit warning. (Reporting by Muvija M in Bengaluru; Editing by Arun Koyyur)