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Hi, provided you are paying your Daughters for their share in the property, there will be no need for a Deed of Variation to be prepared. This is because a Deed of Variation is used in circumstances where the beneficiaries wish to amend post death their entitlement under the Will. (As you are paying your Daughters for their share, they are still in effect still receiving their benefit from the Will albeit that they are receiving cash for their share).
All you therefore need to do is to instruct a Solicitor to prepare the Land Registry document transferring the property to you.
I hope this assists and sets out the general legal position.
All the best Andrew