Tesco completes $5.5 bln takeover of Booker​

* Booker shares de-listed

* Integration of Tesco (Frankfurt: 852647 - news) and Booker to begin

* Takeover approved by court on Friday

* Investors backed deal on Wednesday (Adds detail)

LONDON, March 5 (Reuters) - Tesco's 4 billion pound ($5.51 billion) takeover of Booker has completed, both companies said on Monday, creating a new powerhouse in Britain's 200 billion pound-a-year food market.

The cash and shares deal to combine Tesco, Britain's biggest retailer, with Booker, the country's largest wholesaler, received court approval on Friday and is now in effect.

The deal received regulatory approval in December and both sets of shareholders backed the plan last Wednesday.

Booker shares have now been de-listed from the London Stock Exchange. For each Booker share Tesco offered 0.861 new Tesco (Swiss: TSCO.SW - news) shares and 42.6 pence in cash. Tesco shares closed Friday at 202 pence.

Analysts noted that with a market capitalisation of just under 20 billion pounds, Tesco is now bigger than the whole of rivals Sainsbury (Amsterdam: SJ6.AS - news) 's, Morrisons, Marks & Spencer (Frankfurt: 534418 - news) and Ocado put together.

Tesco will now start its "Joining Forces" programme to integrate the two businesses.

Charles Wilson, formerly Booker's chief executive, takes over as CEO of Tesco's retail and wholesale operations in the UK and Ireland (Other OTC: IRLD - news) reporting to group CEO Dave Lewis.

Stewart Gilliland, formerly Booker chairman, will become a non-executive director of Tesco.

($1 = 0.7254 pounds) (Reporting by James Davey; editing by Sarah Young and Jason Neely)