What ‘work’ is required, you mention a car park , is excavation through this car park required ? , what sort of address is it , if it’s a flat/apartment , are you on the ground floor or upper floor so any ‘cables’ would have to be attached to the wall of another flat ( something you can’t give permission for ) ?
OR wayleaves will look on land registry for who owns the freehold and write to them , if this is ( as often is ) a foreign owner , or large company ( insurance company for example ) getting a response can be time consuming, you offering the name of whoever you pay rent to , or who you assume is the freeholder isn’t necessarily what’s recorded on the land registry .
https://www.broadbandchecker.btwholesale.com/#/ADSL/AddressHome
Post the results from this checker for your address , it may well give an insight into why a delay is necessary, although it does seem that it’s purely waiting on acceptance of a wayleave, the other potential problem is if the freeholder says OK to allowing the work but sees an opportunity to fleece Openreach and demands a payment.
