The House of Lords will debate two private members' bills on Friday 1 March covering  attacks on service animals and anonymity of arrested persons.

A private member's bill is a type of public bill (that affects the public). Private members' bills must go through the same set of procedures as other public bills.

A bill to prohibit the publication of certain information regarding persons who have been arrested until they have been charged with an offence and to set out the circumstances where such information can be published without committing an offence.
now who would the lords want to protect?

https://www.parliament.uk/business/news/2019/february/lords-private-members-bills-february-2019/