RIH: the joy of conspiracies is the problem of proving a negative. An element of bluff assists all formed force - in cricket it's "sledging". Let's concede bluff for UK's Violet Club. After Blue Danube's live drop, 11/10/56, 138 Sqdn. Valiant/Wittering was progressively brought to 8 rounds/Unit Establishment, followed from 21/5/57 by 83 Sqdn.Vulcan 1/Waddington, then 10 Sqdn. Victor 1/Cottesmore. Red Beard followed from 9/60, Yellow Sun Mk.1 from early-1960. Many thousands of professionals, some posting here, believed it was all for very real.
So if they were all deceived - say by AWRE shipping ballast, say by Barnham/Faldingworth MU personnel happily conniving at not knowing what was inside the (empty) physics packages - then some hundreds of cheats in the AW production industry - all those Risleys/Cardiffs/Burghfields - have since kept very stumm.
If your point is the lack of publicity to the fit of US stores to RAFG Canberra B.(I)6/8 from 5/58, from the Canberra B.6 Tactical Bomber Force from 2/7/59 and from much of the Medium Bomber Force from 1/10/58...well, yes, and...?? If your point is that indigenous UK stores were few and fraught, before rollover for US-data-infused Red Snow and later warheads, well, we know that. Wynn's Official History removes US weapons from MBF 17/3/62 and from the TBF, 7/65.