Judge Rinder keeps

[shitpark]

saying it "sub starn tial". It is irritating me. How do you pronounce substantial?
I say a hard 'a' sound, don't know if it's because I'm from Up North, but I've never heard it pronounced as "sub starn tial"

I think it’s his RP way of speaking. How do you pronounce it?

I’d say sub Stan shul. I think.

Sub Stan shul.

My husband ways sub Stan she-all.

sub stan sheal would irritate the tits off me
I say sub stan shal
like a normal person

I might start saying it the way judge Rinder does.

I'm another sub stan shul. Emphasis on the an.

I don't understand where the r comes from but I might start pronouncing it that way though like @DobbyTheHouseElk

I say it the same as you OP, but a strong RP accent will say the 'a' as a long 'a', just as in bath and grass.
I have an RP accent, but not SO strong, and I say a short a.

like a normal person

hmm.

I’m RP. But don’t add ‘r’. Although I will be now!!

I wonder if his accent is to appeal to USA fans, it’s quite particular.

I fancy Judge Rinder.

There - I've said it.