Royal Botanical Gardens in Kew is preparing to start tendering for a contractor to deliver a £50m programme of works to its Grade I and Grade II listed buildings.

The iconic pagoda in Kew will be refurbished as part of the restoration work

It expects to spend £5m-£10m a year over the next five years on a mixed programme of works including new builds, refurbishment of historic buildings and repair and replacement of M&E systems.

The successful programme contracting partner will also used to deliver work at the Wakehurst Place site in West Sussex.

Kew is expected to release an official tender notice within the next few months, but firms interested in more information can email the procurement office.

ISG recently secured the last major contract at UNESCO World Heritage site to restore the Grade-I listed Temperate House, dating from 1863. The £34m restoration project will see the Victorian glasshouse will remain shut until May 2018.

The new programme of works will include restoring Kew’s iconic 10-storey Pagoda built in 1762.