I don’t agree. The -ize spelling is older than -ise and in Larkin’s day was the house style of Faber. From the first edition of High Windows, for example: ‘One no longer cicatrized…’

From (Si Si) Je suis un rock star (1981):

We could go on the hovercraft
Across the water
They’ll think I’m your dad
And you’re my daughter

Style Council. I really like it when you speak like A child.

Amelia is hampered for me by the bathetic last but one verse, with its cartoon image of zooming down from altitude, wings outstretched, to crash into a man on the ground.

Perhaps there is an art to find the mind’s construction in the face.
From Ossie Clark’s Wiki page:

hedonistic… divorced… slow downward spiral… never recovered emotionally… strained… bankruptcy… […]

Twat always used to be pronounced twot in London when I was growing up, though it now seems absolutely universal to pronounce it rhymed with cat. Twot is the only pronunciation in the full OED. I blame Robert Browning.