Sir Richard Branson warns that oil crunch is coming within five years. [http:--current.com-1k8ts4c (Current TV)]date=August 2019 [http:--www.thisismoney.co.uk-news-article.html?in_article_id=499145&in_page_id=2 (thisismoney)] [https:--www.telegraph.co.uk-finance-financetopics-oilprices-7203172-Britain-faces-oil-crunch-within-five-years-Richard-Branson-warns.html (Telegraph)] [http:--theenergycollective.com-TheEnergyCollective-58428 (theenergycollective)]date=August 2019