The £1.6 million revamp will see upgrades to the drama department, gymnasium and pupil toilets.

At the same time, there will also be the creation of a new fitness suite, several pupil breakout areas, much-needed repairs to windows and the demolition of an office building at the rear of the site.

Outlining its approach the local authority wrote: “The external envelope is original in its entirety and some elements are no longer performing or have reached the end of their design life.

“Some examples of defects include windows are no longer wind and watertight and are thermally inefficient.

“Steel frames on occasion are warping and placing glazing under stress, single glazing is unsuitable for location and users (fragile/easily broken) and a significant number of windows no longer open or close at all or fully.”

On the outside of the building it notes: “Sections of concrete are missing and there is insufficient cover for reinforcement resulting in reinforcement decaying.

“Sills are primarily flat resulting in insufficient rainwater run-off and freeze/thaw damage.

“Cladding to the North section is insufficient or rotten fixings are causing the concrete panels to debond.”

The largest section of work proposed will see the replacement of windows on the north wing replaced in their entirety, on the west wing at ground level and on the gymnasiums located in the south, removing the old metal ones and installing new double glazing.

The north side will also see replacement of cladding, some cills and lintels, render, column enclosures and repointing of the base course to all the elevations.

Internal works will see the creation of a fitness room in the west wing, while pupil breakout areas will be constructed on the ground floor of the north wing next to the rear street level exit.

Demolition is also to be undertaken of the office which sits to next to the assembly hall on the end of the north wing as it was found that subsidence of the structure was not economic to deal with.