Bomber command diaries states 18 Blenheims, 12 to Merville airfield and 6 to Vignacourt aircraft depot. 3 aircraft lost.
That's all for June 30
Details for the 3 Blenheims, from 107 squadron, found here,
http://www.epibreren.com/ww2/raf/107_squadron.html#3006