We are not permitted to give you any names of Architects or Builders.
Choose an established builder and ask to talk to previous clients - find out if they were happy with the work, whether it was started and completed on time and if the final bill was in line with the estimate. A builder with a reputation to preserve is more likely to be around if you have problems later.
Never choose a builder on the basis of a low estimate alone. Good builders who refuse to cut corners will seldom be able to compete on price with those that do.
Avoid builders who offer VAT free deals in return for cash payments.
For further information, see our guidance 'Choosing a Reputable Contractor'.