<sod >The transition period was beginning to look âas long as a piece of stringâ, Mr Cash told Robin Walker, the Brexit minister, and Sir Tim Barrow, the UKâs ambassador to the EU.< eod>< sod > The transition period was beginning to look âas long as a piece of stringâ, Sir Bill told Robin Walker, the Brexit minister, and Sir Tim Barrow, the UKâs ambassador to the EU.< eod>