In a statement issued on its website the BJP has stated the reasons for party patriarch LK Advani’s return to the party. Here is the full statement:  

“The BJP Parliamentary Board yesterday decided not to accept Shri L.K. Advani’s resignation from the three main fora of the Party – the National Executive, Parliamentary Board and Election Committee and requested him to continue to be a member of these three Bodies.

On behalf of the Party Shri Rajnath Singh assured Shri Advani that his concerns about the functioning of the Party would be properly addressed and the President will discuss the modalities of addressing these concerns with Shri Advani.

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Today afternoon, RSS Sarsanghchalak, Shri Mohan Bhagwat spoke to Shri Advani and asked him to respect the BJP Parliamentary Board decision and continue to guide the Party  in national interest.  Shri Advani has decided to accept  Shri Bhagwat’s advice.”

source:http://www.firstpost.com/