Whoever the young mother is, hope she reads this
https://www.gov.uk/guidance/enforcement-officers-issuing-fixed-penalty-notices
Children under 10 cannot be issued with an FPN and according to the regulations, parent or guardian can be informed of the offence, but certainly does not state that the parent should be issued with the FPN instead.
So young mum, get a complaint in to the council. Don’t appeal it, complain about it as it was illegaly issued
It is a disgrace that the local Council are allowing this company to manage litter Enforcement.
This role should remain with the Local Authority, employ local people who can work with a community to manage litter and develop some pride in the town, issue fines where they are deserved, but keep within the Govt guidelines of courtesy and assistance -ask to pick up, be helpful and ensure the streets are cleaned, not like Kingdom who leave it lying where it is, and are known to issue FPNs where none is deserved.