Broken oil dipstick

Hi all

I have just purchased a 2001 Clio 1.2 for my son to learn to drive.

Just checked the oil dip stick and found the bottom part below the O ring broken in the oil tube, tried to get it out by various methods but no luck.

Question how difficult will it be to remove to engen sump to get this broken part out.

Any help most appreciated

George M