The strong roots that the school had established during the first three decades of its life were to nourish an extraordinary change. The first hints of the revolution to come happened at the start of 1982 when boarding finally ended and the school became a day only school with 234 boys.

This change in emphasis led to a rise in interest in the Junior School (now called Wyndhams) and within three years junior numbers had risen from 36 to 84; two new classrooms for each year group were built and in December 1985 separate Nursery sessions held on two afternoons a week were introduced. This growth also saw the start of an ongoing irritation - the February 1986 edition of INAMOS noted problems of car park congestion causing severe tailbacks on the Reading Road!

The momentum for positive change now led to a fundamental change in the intake of the School. In June 1986 the Governors approved a timetable for the school to become fully co-educational, the first intake of girls to be from September 1988. Plans for a new multi-purpose hall were also set in motion as numbers were now at 266 and accommodation needed to be increased. At the same meeting it was also agreed to double Nursery provision to four afternoons.

In the November of 1986 two bungalows owned by the school were sold and the proceeds used to help finance the construction of the new hall.

The School intake became fully co-educational in September 1988 in accordance with the two-year plan and numbers rose to 316, the first time that there had been more than 300 current Yateley Manor pupils.

1989 saw the building of the new hall which in the October of that year, was named the Fyson-Blum Hall in honour of the Founder Mrs. Sybil Fyson and Mr. Adelbert Blum who had been instrumental in founding the School and who had taught there for 42 years. Unfortunately this happy event was marred by tragedy on 4th November 1989 when Mr. Blum was killed in a traffic accident.

1990 saw many changes as the old school continued to be transformed; the chapel was converted into The Studio at a cost of £30 000 which included the purchase of the demountable staging as well as sound and lighting facilities. The pond was also excavated and a small ‘Nature Area’ was established. On the sports scene the first ever Netball match took place, this was against Daneshill and resulted in a 19-2 defeat - how times have changed! At the end of the year the Gymnasium was burnt to the ground and was replaced a year later by the present building at a cost in excess of £100 000. 1991 also saw the Senior Library undergo a £10 000 refurbishment and 100% Common Entrance pass rate in consecutive years. Sadly the year also brought the passing of the Founder and first Principal, Mrs Fyson, who died on 27th September.

As the school continued to grow, improvements continued to come thick and fast; 1992-93 brought new hard play areas, £30 000 of new computers (now museum pieces!) and £50 000 was spent on building a prep room for the Science Department and refurbishment of Lab 2. As well as physical changes, many further improvements were made to the organisation, the prefect system was overhauled and in 1993 Ross Hunter became the first Captain of School.

The car park was improved during 1994 to try to alleviate many of he problems of queuing and access. The one way system was introduced, the area was landscaped and drop-off zones introduced to try to increase safety and access.

In 1995 the school underwent an OFSTED inspection which included the remark ‘You are way ahead of the field’. This was further evidenced in the same year as the 100% Common Entrance pass rate was maintained for the sixth year in succession.

1996 saw great upheaval as many of the old buildings were swept away in the first phase of the £1.5 million redevelopment which was to result in Manor Court. Much of the school (which now had 500 pupils) decamped to temporary classrooms situated on the hard play areas. The foundations were completed by May and this work coincided with a large extension to the Library as well as a totally redesigned layout.

Manor Court was officially opened in June 1997 by the artist and television personality, Tony Hart. There was a week of celebrations to mark this latest and most dramatic development.