Leasehold and Freehold Reform Bill

I thank my constituency neighbour for giving way; if he is fortunate at the next election, he may inherit some more leasehold flats. As he will know, in this country a freeholder holds their freehold for a period of 999 years from the Crown and that may run out before any new leasehold is able to conclude its 999 years. Does he understand what the Government propose to do in that situation?