North with game in ♥ s can open an Acol 2♣ .

South has a positive 8+ HCP 2♠ s

North responds 3♥ s showing 5+♥ s.

West will show support by either bidding 4♥ s or 4NT RKCB.

Over 4♥ s, North can try 4NT RKCB, though not ideal with a void.

South responds 5♣ (1 or 4 Keycards)

North bids 5♥ s in case it is only 1 Keycard

South with 4 keycards will bid 7♥ s

If South bids 4NT instead of 4♥ s, this is RKCB for the last bid suit ♥ s.

North will bid 5♣  (1 or 4 Keycards - again) . If playing RKCB with useful voids still 5♣  as ♠ void, in partners suit is not useful.  RKCB info including with voids

South will bid 5♦ asking for Q♥ s.

North will bid 6♣ showing Q♥ s and the K♣ .

South will then bid 7♥ s

Well done to those who could and did bid it.