As a brit I'm the same but the other way round. 'erb just sounds so very wrong to me.When I first heard someone pronounce herb with an H....my mind was blown. But I can't say it. I won't do it.
Regardless for such a small country we (the UK) have such a large variety of accents and dialects that pronounciation of words from several different British people in the same room can very pretty distinctly. With the exception of....
Aussies
Vegemite - veg ee might
Marmite - mar might
Brits
Vegemite - veg em it ee
Marmite - marm it ee
This. Literally no one here has ever said that. You've never spoken to or heard a British person speak before this is abundently clear.
None of this is weird to me after I found out that brits typically warm their water for tea in the microwave.
Never seen this once in 35 years here. That is what a kettle is for.