Middle Class Scottish
In other words, the middle class Scottish accent called the 'Kelvinside twang' in Glasgow and 'Morningside' in Edinburgh.
Speakers of note: The late John Smith
George Galloway etc
There was a habit of pronouncing 'a' as 'e' so that both 'merry and 'marry' sound the same. If it is spoken with the use of Scots words it can sound a bit odd like this;
'Ehm eff tae merry Berry this mernin'
I'm going to marry Barry this morning.
'Och away an run ye glaiket lih-kinn wee baern or ehl have yer mammy telt.'
Get away from me you 'glaiket' (sullen) looking little kid or i'll tell your mother.
Nowadays we pronouce these words with harder vowels as the Scottish custom.