Conifer hedge help

Hi all,

I have a conifer hedge that surrounds the house and in one corner the hedge has become bare. I'm aware this type of conifer would not grow back and was told that the only option is to plant some new conifers so that they can blend in and plug the gaps as they grow.
Few questions on this...
1) does this sound a right solution or are there other options I can pursue
2) is there anything I need to look out for if planting new trees in this space
3) if I'm planting new trees I would like them to be the same species as the ones I have so they blend in well. Can anyone tell me what type of conifers I have from the attached photos?
Many thanks in advance

Rob

 

Do the leaves have a kind of citrusy smell if you rub them ? If so, it might be Thuja plicata, but l think it's probably Lleylandii.

 

No they definitely don't smell citrusy. Looking at conifers in garden shops it looked like Lleylandii but there are so many varieties that look similar!