this from a mortgage provider's site might help:
2) Legal Fees & Outlay Costs
Costs now vary as solicitors are becoming more aware of competition but the guideline scale fee for this service is 1% of the purchase price plus VAT. On top of that, you will bear all outlay costs. These, again, will vary depending on whether your deeds are registered with the Land Registry or Registry of Deeds. Ask your solicitor to outline all costs to you at the outset. Your legal fees will amount to a substantial sum so it is well worth shopping around for a competitive solicitor.