That is just the anti-EU spin, right?  But corporations are about maximizing profits, and they separate the spin from the reality, can't they?  So if the EU in fact, not in spin, helps to improve their profits, what are they gaining by attacking it?  Or are you saying that in fact UK corporations' profits are less with the UK in the EU than if it were outside it?

Here is a pure hypothetical:  Suppose that EU regulations miraculously changed/disappeared (e.g. under pressure from the supposed resurgence of the right in the recent elections) to become perfectly amenable to the interests and aims of UK corporations.  Then would the anti-EU rhetoric in the UK media -- at least the part driven and sponsored by UK corporations -- disappear and give way to pro-EU rhetoric?

Truth unfolds in time through a communal process.