the solution above by @Mike.Buttery is an approximation assuming the earth is spherical.
It’s fine for a quick conversion.
As I said in the other post :
- Each coordinate system has an EPSG code- yours is EPSG:2952
- Common coordinate system used for GPS etc is EPSG:4326
Various libraries for reprojecting (translating) have these coordinate systems built in- you just need to specify source and destination systems. i.e 2952–>4326.
Using one of these libraries (such as PROJ)- whether in Python or something else is probably the easiest and most reliable