Hints on pronunciation when in England

I take it you already know
Of though and bough and cough and dough
Others may stumble, but not you
On hiccough, thorough, laugh and through
Well done! And now you wish perhaps
To learn of less familiar traps.

Beware of heard, a dreadful word
That looks like beard and sounds like bird
And dead; its said like bed not bead
For goodness sake don't call it ?'deed'
Watch out for meat and great and threat
(They rhyme with suite and straight and debt).

A moth is not a moth in mother
Nor both in bother, broth in brother
And here is not a match for there
Nor dear and fear for bear and pear
And then there's doze and rose and lose
Just look these up and goose and choose.

And cork and work and card and ward
And font and front and word and sword
And do and go and thwart and cart
Come,come, I've hardly made a start
A dreadful language? Man alive!
I'd mastered it when I was five.