‘Nat Bilaval’ is a lively combination of ‘Bilaval’ and ‘Nat. This version of the raga depicted artistic blend of these two ragas on the romantic Sitarkhani tala. Pandit Sanjoy Bandopadhyay gave a brilliant depiction of the raga in his sitar. Dilip Mukherjee gave a lively tabla support.
Here is a small clip: