With respect:
Vinyl tiles are not "part of the DPM" .
Visqueen, or its equivalents were widely used in the 1970's.
Personally i'd remove a short length of skirting to reveal a probable DPM, rather than hole the concrete.
Before doing anything else, lift the tiles, scrape the floor and see what condition its in - then come back here.
Stay away from self levelling compound and ceramic tile until you have thought thro the consequences, such as a raised finished floor.
The tile can be scored at the skirting and then lifted/snapped up.
Vinyl tiles are not "part of the DPM" .
Visqueen, or its equivalents were widely used in the 1970's.
Personally i'd remove a short length of skirting to reveal a probable DPM, rather than hole the concrete.
Before doing anything else, lift the tiles, scrape the floor and see what condition its in - then come back here.
Stay away from self levelling compound and ceramic tile until you have thought thro the consequences, such as a raised finished floor.
The tile can be scored at the skirting and then lifted/snapped up.