The proposed technology park would be located just west of Hollybush Lane, within the area covered by Denham Parish Council. The site is bordered to the west by the M25, to the south by the M40, and to the east by Hollybush Lane. To the north, the site is bordered by a copse of trees, beyond which is a field and the village of Tatling End. Existing high voltage overhead powerlines are located in the south west of the site.

Below: the proposed area for Hollybush Technology Park, outlined in red.

The land was previously used for mineral extraction, and subsequently as a landfill site. Planning permission was granted for remediation and restoration of the former landfill in October 2014.

In 2023, a public consultation was held regarding a proposal for film production space on this site. However, following conversations with Buckinghamshire Council and potential operators, as well as broader movements within the entertainment industry, a decision was made that the proposed use was no longer the most viable option and best use of the land. Consequently, the planning application for this proposal was withdrawn in 2026.

Why here?

Hollybush Technology Park is proposed in a sensible location, as a brownfield, former landfill site that can support the technical requirements of modern cloud computing.

Data centres have very particular locational requirements in relation to existing power and fibre infrastructure. Modern cloud computing relies on clusters of interconnected data centres operating within a close geographical area. These clusters are known as Availability Zones.

Data centres within an Availability Zone must be located close together to enable the near-instantaneous transfer of data and to maintain service resilience. This means suitable locations are limited. Hollybush Technology Park is positioned within the Slough Availability Zone, one of the largest concentrations of data centres in Europe and a key component of the wider London Availability Region. The Slough Availability Zone has developed because of its proximity to: London, high-capacity electricity infrastructure, strategic fibre-optic networks and existing digital infrastructure clusters.

Our proposal would also bring a former landfill site back into economic use, all whilst delivering extensive environmental improvements and long-term landscape management.

The site, like much of the surrounding area, is technically classified as Green Belt, however given its previous uses and location, we believe it to be more accurately classed as grey belt. Grey belt is a planning designation introduced by the Government in 2024, and is designed to allow appropriate development on previously developed or low quality Green Belt land. The site also lies near to Gladwin’s Wood – a designated Ancient Woodland which would be protected and conserved as part of our proposals.