▁plans ▁for ▁a ▁joint ▁appearance ▁by ▁S la pp ▁Happy ▁and ▁Virgin ▁label ▁m ates ▁Henry ▁Cow ▁and ▁Wy att ▁at ▁a ▁free ▁concert ▁in ▁Hy de ▁Park ▁in ▁London , ▁but ▁this ▁was ▁cancel led ▁at ▁the ▁last ▁minute . ▁However , ▁on ▁ 2 5 ▁June ▁S la pp ▁Happy ▁recorded ▁a ▁Top ▁G ear ▁session ▁for ▁the ▁BBC , ▁en list ing ▁the ▁help ▁of ▁former ▁and ▁current ▁Cow ▁members ▁Geoff ▁Le igh , ▁Fred ▁Fr ith ▁and ▁L inds ay ▁Cooper , ▁plus ▁Wy att , ▁who ▁contributed ▁guest ▁vocals ▁and ▁per cussion ▁to ▁a ▁version ▁of ▁B leg v ad ' s ▁" A ▁Little ▁Something " ▁from ▁Cas ab lan ca ▁Moon . ▁Cred ited ▁as ▁" S la pp ▁Happy ▁& ▁Fri ends ", ▁this ▁was ▁later ▁released ▁in ▁ 1 9 9 4 ▁on ▁Wy att ' s ▁compilation ▁album , ▁Fl ots am ▁J ets am . ▁ ▁S la pp ▁Happy ▁returned ▁to ▁the ▁studio ▁in ▁May ▁ 1 9 7 4 ▁to ▁record ▁two ▁new ▁compos itions ▁with ▁session ▁mus icians , ▁" E uropa " ▁and ▁" W ar ▁( Is ▁Energy ▁Ens la ved ) ". ▁Virgin ▁had ▁requested ▁a ▁single ▁that ▁was ▁" radio ▁friendly ", ▁but ▁upon ▁hearing ▁the ▁songs ▁they ▁rejected ▁them , ▁stating ▁that ▁they ▁felt ▁they ▁were ▁better ▁su ited ▁for ▁an ▁album . ▁This ▁caused ▁B leg v ad ▁and ▁Moore ▁to ▁re th ink ▁their ▁song writing ▁strategy , ▁and ▁they ▁began ▁producing