John Vincent, 49, urged ministers to study economic impact before extending lockdown by weeks or months
The co-founder of Leon said it is 'quite plausible' his company will collapse if the ongoing situation 'drags on'
He also estimated that fast food chain is losing an extra £800k a week with £200k of cash 'going out the bank'
The comments come ahead of Boris Johnson's plan to unveil his 'roadmap' out of Covid lockdown on Monday