Can a future intention to provide management services to a takeover target, in the event that the takeover is successful, be sufficient to establish that the potential acquirer is engaged in economic activity for the purposes of Art. 4 of the Sixth VAT Directive so that VAT charged to the potential acquirer on goods or services provided for the purposes of seeking to progress the relevant acquisition can potentially be considered as VAT on an input to the intended economic activity of providing such management services?