THE South Downs Campaigners called on an expert witness this week in the ongoing South Downs National Park inquiry. The campaigners' expert witness, Professor Robert Tregay, appeared at the inquiry to back the case for the Western Weald to be included in the South Downs National Park. Campaigners - who want the western Weald to be included to protect it from development - were positive last week when they took to the stand to present their case during a three-day session on the contentious western Weald area. Professor Tregay's appearance rounded off a week of presentations to the inquiry in which the South Downs Campaigners (SDC) provided new evidence for the inspector to consider.  Throughout last week, the SDC evidence was to back the claim that the advice given to the inspector by his landscape adviser was fundamentally flawed. The SDC's work was co-ordinated by Margaret Paren. She was supported by many of the SDC's member organisations, including: the Campaign to Protect Rural England, the Ramblers' Association, the Council for National Parks, the South Downs Society, Liss Parish Council, The Petersfield Society and the Woolmer Forest Heritage Society. The SDC hoped Professor Tregay's appearance would greatly strengthen their case by convincing the inspector there is a substantial body of opinion, including professional opinion, that believes that the South Downs National Park should look forward to the 21st Century and include the western Weald. South Downs Campaign chairman Robin Crane said: "We were very fortunate in being able to commission Professor Tregay to appear as our expert witness at the re-opened South Downs public inquiry. "He is regarded as one of the most distinguished landscape consultants in the UK." It is expected to be mid May before the inspector hands over his report to the Government, which is set to make a decision in January.