Let's not confuse acting in the UK's interest with not sympathising with terrorists.
Particularly in the context of the UK's history of foreign invasion, slavery, concentration camps, massacres of civilians, collusion with kidnapping and torture, supplying weapons and training to dictators who use them to terrorise both their own populations and that of countries around them, the UK's continued unlawful development of new WMD's etc, I would suggest that it really doesn't make sense to suggest that acting in the UK's interests means that you're not colluding with terrorists.
I await the pictures of May condemning the vast amounts of UK taxpayers money which ended up as bribes in the pockets of Saudi royalty, the reports of May condemning the killing of uncounted numbers of civilians by UK forces in Iraq, together with the subsequent rise in anger, hatred and terrorism, condemning the Saudi air strikes in Yemen, given the overwhelming evidence of repeated breaches of international humanitarian law.