The plate that supports the front wheel is very thin and is made from a brittle aluminium alloy. After a while this plate simply snaps in two, which could present a serious safety risk.
In our case we had two options:
Clearly there are moral issues with paying someone to replace a part which should never have broken in the first place, and replacing it with a part which would probably just fail the same way. So, we took the DIY repair route.
Now apply the aluminium mesh and metal-bonding adhesive resin under the plate area, across the break line. Apply some of the resin to the break line on the top surface so that you have filled over any sharp metal edges. This step is more for a smooth finish than strength, but can't hurt.
Cut the new metal sections to length, bending at the end where necessary to match the profile of the broken plate. Drill holes through the sections and buggy plate, and secure them in place with the shorter bolts.
When the metal adhesive has dried, you can smooth it down with a file. Also use a file to smooth down any sharp metal edges around the repair.
Exactly how you do all this depends on the nature of the breakage and what replacement metal sections you have available.
Check whether your buggy is still in warranty before thinking about doing your own repair. If it's under warranty, get Mama's & Papas to do the work themselves, and let them know how upset you are that the buggy has such a dangerous weakness.
Any instructions you follow here are entirely at your own risk, and it is your responsibility to verify the integrity of the repair whenever the buggy is used.
Follow all manufacturer's instructions carefully, particularly with the adhesive.
Be very careful when using tools, and do not proceed if you are not experienced with metal-working and the use of drills, saws and files.