If you can confirm the Lives are on the same circuit and the neutrals of the relevant lights are also on the same circuit, then it MAY be possible to use one of the Lives only and safely seal off the other one.
Not ideal but May be possible.
A better solution would be to fit 2 one gang versions side by side.
Not ideal but May be possible.
A better solution would be to fit 2 one gang versions side by side.
