This is a theoretical case, as published in the magazine of the Dutch union. The 2♠ bid is alerted and explained as 5-card ♠ plus a 4+ minor suit. NS, both young and enthousiastic, have this agreement, but N decided that he wanted 'to do something' with his 8-card spades. For argument's sake, let's asume that he might also have opened muli 2♦.
What do you do if EW call you, because they feel cheated, also because they didn't know that N could bid vul with only 1 HCP?