I wonder if it might be worth refreshing ourselves on what Hendy's letter actually said about Systra's future work prospects? I think the key passage is this:
Does he explicitly say "If you don't sack Dennis we won't do business with you and we will make sure no-one who works with us will do business with you"? No, of course not. But I think if you read between the lines it's perfectly clear what Hendy is saying here and I think you'd need to be incredibly trusting to think that he isn't saying "Sack him or give up on any contracts with us or anyone who works with us" between the lines.
And, of course, finding a potential supplier criticising a possible client reflects adversely on your likelihood of doing business with us or our supply chain.
Does he explicitly say "If you don't sack Dennis we won't do business with you and we will make sure no-one who works with us will do business with you"? No, of course not. But I think if you read between the lines it's perfectly clear what Hendy is saying here and I think you'd need to be incredibly trusting to think that he isn't saying "Sack him or give up on any contracts with us or anyone who works with us" between the lines.