Vauxhall Astra front and back lights turning on when parked.

Sure it's not parking lights that are on and are operated through the indicator switch when car switched off and locked ? , I.E switch in right / left position puts that side on

Sure its not parking lights.

Come back home, laft car parked and locked on driveway

Lights switch - left on position OFF (0)

BUT

Randomly and frequently car itself is turning lights on (daytime running lights)

Its happening no matter when I am switching lights OFF (after or before turning ignition OFF).

Coming back to car to turn them OFF but switch not working.

I am turning ignition ON and OFF as the only way to make lights turning OFF.

Last weekend I've left lights switch on position 1, and then turned engine OFF. lights did not turn on during weekend. But after some driving this week the issue is back

Make sure the indicator switch is in middle / neutral position . Otherwise you need an auto electrician