LONDON, July 21 (Reuters) - Birds Eye Iglo has launched syndication of a 500 million-euro ($645.3 million) leveraged loan for its acquisition of Unilever's Italian frozen food unit Findus, banking sources said on Wednesday.

The new bullet term loan D, which ranks pari passu with Birds Eye Iglo's existing senior debt, matures on April 30, 2016 and pays a margin of 475 basis points (bps) over EURIBOR, the bankers said.

The loan is being arranged by bookrunners Credit Suisse, Deutsche Bank and Nomura, the bankers added.

Mediobanca has joined the financing as mandated lead arranger, one of the bankers said.

Existing lenders have been invited to a bank meeting on July 22 at the Renaissance London Chancery Court Hotel to discuss the new financing as well as a waiver request on the existing debt; while prospective new lenders have been invited to a bank meeting on July 26 at the Berkeley in Mayfair, the banker added.

Birds Eye Iglo is also seeking consent from existing lenders for the acquisition and to allow the company to raise new debt to partially fund the deal, the bankers said.

Existing lenders are being offered a 100 bps 'early bird' consent fee if they commit by the early deadline of Aug. 3 or 75 bps if they commit by the final deadline of Aug. 10.

Lenders receive 50 bps of the consent fee upfront if they commit by the early bird deadline, or 25 bps if they commit by the final deadline, while the remaining 50 bps of the fees will be payable when the transaction closes.

In addition to the consent fee, the interest margin on Birds Eye Iglo's existing loan will be increased by 175 bps across senior tranches, and by 225 bps on the senior mezzanine and junior mezzanine facilities.

The deadline for commitments on the new financing is Aug. 12, while the acquisition is expected to close on Oct. 1.

Birds Eye Iglo was acquired by Permira from Unilever in November 2006 for 1.73 billion euros. That deal was backed with a 1.5 billion-euro buyout financing arranged by Calyon, Credit Suisse, Goldman Sachs and Lehman Brothers, according to Thomson Reuters LPC data.

($1=.7748 euros)

(Reporting by Alasdair Reilly and Zaida Espana; Editing by Greg Mahlich)