Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.

[EX Q]: Sgt Michael Grigg was jailed in December after being found guilty of two counts of penetrative sexual activity with a child. His victim, a girl aged under 16, was a police cadet at the time, a misconduct hearing was told. Hertfordshire Police Chief Constable Charlie Hall said Grigg's conduct was "outrageous and extremely damaging". He found the officer's actions amounted to gross misconduct and said Sgt Grigg would be dismissed without notice and added to the barred list. "His conduct is a million miles away from what is acceptable or expected from a police officer," he said. "Sgt Grigg has proven himself to be a disgrace to his colleagues and the profession." The officer, formerly of Hatfield, was sentenced to six and a half years in prison in December after being convicted at Harrow Crown Court. He was also placed on the sex offenders' register for life and made the subject of a sexual harm prevention order. The hearing was told the officer, who is in prison, was informed of the misconduct proceedings but "made it clear he wished to have no involvement". The offences took place between 2007 and 2012 while Sgt Grigg was a cadet leader for the force and his victim was a cadet. Mr Hall said Sgt Grigg "targeted the vulnerable person, a child, at times he knew they would be alone". "He abused his position of trust as a police officer and cadet leader for his own personal sexual gratification," he said. "His behaviour has been quite appalling. I feel completely let down by Sgt Grigg's outrageous conduct." Find BBC News: East of England on Facebook, Instagram and Twitter. If you have a story suggestion email eastofenglandnews@bbc.co.uk Related Internet Links Hertfordshire Police
[EX A]: A police officer who engaged in sexual activity with a child while working as a cadet leader has been dismissed.

[EX Q]: Ministers commissioned expert analysis of the policy, which found that it would cost £6.7m per life saved over the next decade. This, the consultants concluded, was not cost effective. Environment Minister John Griffiths said there was a need to accept that there was a cost involved. Regulations will be introduced in September next year for all new and converted residential properties in Wales to be fitted with sprinkler systems. Work is due to begin on the development of the regulations and the technical requirements necessary to introduce the Welsh law which will be subject to public consultation. Wales was one of the first countries to rule that all new homes are fitted with sprinklers but had set no timetable for its implementation. Ministers say it will save a predicted 36 lives and prevent an estimated 800 injuries between 2013 and 2022. The regulations is the result of the Domestic Fire Safety measure proposed by Ann Jones, Labour AM for the Vale of Clwyd, which was passed in the last assembly. According to UK fire statistics, there are an average of 2,168 fires, 17 deaths and 503 injuries in fires in residential premises in Wales every year. Mr Griffiths said: "We must seek to prevent avoidable death and injury from house fires and need to accept that there is a cost to introducing sprinklers into new properties. "These proposals are significant and important in taking forward fire safety. "Wales will be at the forefront of reducing fire risk and cutting the number of avoidable deaths and injuries caused by fires in residential premises." However, the government-commissioned cost benefit analysis from experts BRE Global found that between 2013 and 2022 the cost per life saved of the sprinklers policy would be £6.7m. They concluded: "Fitting sprinklers in all new residential buildings in Wales would not be cost effective."
[EX A]: The Welsh government is to press ahead with its policy of fire sprinkers in all new homes from 2013, despite being told that it is not cost effective.

[EX Q]: The project at Nelson's Wharf and the Ferry Steps had been expected to start in March and end in June. Works will now start at the end of next September to avoid holiday season disruption, the Harbour Management Board has said. Part of the scheme will involve driving piles into the ground, which will be heard, and felt, in nearby buildings. The works, at the pavilion end of the harbour, will also lead to some road closures, the Local Democracy Reporting Service has said. 'Hydraulic vibrating' Weymouth and Portland Borough Council has said the section of wall, made of sheet steel in 1960, is badly corroded and at risk of collapse with "localised loss of limestone fill material". The work will involve building a line of new sheet steel piles, driven into the harbour bed. A previous council report on the engineering proposals said: "In the prevalent ground conditions it is unlikely that piles of the required size can be driven by "quiet" methods, using hydraulic rams to push them in, so the piles will probably be driven initially by a hydraulic vibrating hammer and then, when necessary, by hydraulic impact hammer." A report to harbour management board members said that the original proposal would have been disruptive to the local holiday trade and harbour operations.
[EX A]:
Repair works to crumbling harbour walls in Weymouth have been delayed until next autumn.

