She said officers were looking for any signs of ‘whether William was taken poorly there’.“We know it has been just over four weeks since he has disappeared. ‘We have searched out buildings, other buildings on the land extensively – this is just the next stage.“This the deeper more involved search of the fields where the crops have grown.”Officers had already searched the perimeters of fields and buildings on the farm, which is located in Gosmore. William Taylor’s Land Rover Defender TD5 90 was burnt out just a week before he went missingCredit: SWNS.com/ SWNS.com “We have to do it incrementally, which is exactly what we are doing.”The alleged arson attack on Mr Taylor’s vehicle has not been connected to his disappearance, according to Hertfordshire Constabulary.A spokesperson for the police force said: “An allegation of arson was reported to police by Mr Taylor on Saturday, May 26.”His vehicle is believed to have been deliberately set alight. The investigation around this is currently on-going.”Mr Taylor’s Land Rover Defender TD5 90 was burnt out just a week before he went missing. Police have accessed Mr Taylor’s mobile phone records and bank accounts as part of their investigation.He is described as white and around 5ft 11in tall with a medium build and has short grey hair.Mr Taylor was last seen wearing a blue shirt, jeans and black wellies. Police are searching for 70-year-old farmer, William Taylor, who went missing more than a month ago after reporting an arson attack.Taylor disappeared from his £1.2m farm on June 3, days after reporting that his Land Rover had been deliberately set on fire.Police confirmed they have expanded their search this week. A spokesperson for Hertfordshire Constabulary said: “The latest searches cover a 1.7km radius of the farm where crops have grown to waist height and began on Thursday – they are continuing this weekend. The investigation remain a missing persons inquiry.On Friday officers carrying wooden sticks carried out line searches of oat fields that form part of the farm.Speaking from the farm North Hertfordshire chief inspector Julie Wheatley declined to say whether officers were searching for a body. William Taylor went missing more than a month ago after reporting an arson attackCredit: SWNS.com/ SWNS.com Chief inspector Wheatley said: “We have searched the house before, we searched initially … in the house and in the fields. Police return from searching farmlandCredit: SWNS.com/ SWNS.com Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.