Fortunately for their 23-year-old mother, tell-tale features plus the ten-month-old triplets’ emerging personalities mean she for one has no trouble telling them apart.

‘When they were newborns it was quite hard to tell which one was which, but I never got them mixed up myself,’ she said yesterday.

‘They’ve all got dark birthmarks between their eyebrows, but Roman’s is slightly darker than the others’, and Rohan has got a birthmark on his leg as well.

‘When they were in the hospital, the doctors said they were non-identical, but since they came home lots of people have said they can’t tell them apart.’

According to the Multiple Births Foundation, the only way to establish for certain whether twins or triplets are identical – known as zygosity determination – is usually DNA testing.

After consulting them, Miss Allen took cheek swabs from Roman, Rocco and Rohan and sent them off to a laboratory to be analysed – and earlier this month received the news that they are genetically identical.

The cheeky triplets were identified as identical via a DNA swap test that their curious mother had done

Sleeping beauties: The gorgeous trio are adored by their big sister Indiana who is apparently 'not jealous at all' of her baby brothers