I need a letter of agreement or a deed of variation for a house lease

Legal topic: Property Description of legal work: I have just bought a 1-bed flat in a house converted into 4 flats. I have a 125 year lease and own a share of the freehold. The lease states that we are not allowed wooden floors in the flat but there are currently wooden floors in place and I look to replace them with new wooden flooring. I have spoken with the other freeholders and they are happy to sign a deed of variation to the lease or some other legally binding letter of agreement saying that wooden floors are permitted. I need someone to draw up this agreement, please. Extra notes: