What you are saying is that the owners of the freehold are the flat owners. You then go on to say the "owner" wants you to pay for new meters. This is confusing. If you the leaseholders own 25% each of the freehold then you are the owners. Who is this "owner" that wants you to pay an excessive 4.5K? Unless you own a flying freehold and the landlord (the owner of the rest of the freehold) is managing the property....? It would be very helpful to see the supply to the building and the arrangement of the existing electrical metering. Can you post any pictures of this?
If you currently are enfranchised jointly with the other lessees you should have formed a management company, is that the case? As to the meter being broken it is the responsibility of the energy supplier to fix the meter at their own cost. Maybe
Energy Ombudsman: Here to help with gas & electricity complaints - https://www.ombudsman-services.org/sectors/energy is who you should be speaking to.
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