The Boat That Rocked [Promotional 5 x 7" Box]

Vinyl One:
A] Duffy - Stay With Me Baby
B] Dusty Springfield - You Don't Have To Say You Love Me

Vinyl Two:
A] Procol Harum - A Whiter Shade Of Pale
B] Cat Stevens - Father & Son

Vinyl Three:
A] Martha Reeves & The Vandellas - Dancing In The Street
B] The Turtles - Elenore

Vinyl Four :
A] The Who - My Generation
B] David Bowie - Let's Dance

Vinyl Five:
A] The Kinks - All Day And All Of The Night
B] Jeff Beck - Hi Ho Silver Lining

I Think it is released in March 2009 because the film was released on April the 1st?
Any suggestions?

http://bowie-singles.com/EMI/The_Boat_That_Rocked.html

Yes but which month?

the soundtrack CD was released March 30th 2009. the 7" box wasn't for sale, it's a promo-only release, so it's hard to give a fixed date as it was probably sent out prior to the CD.