The document for the proposed third runway covers 'everything' from the new runway to building terminals and aprons, moving the M25 and local roads, diverting rivers, as well as the use of land and construction projects.
The two-part consultation, which began on Wednesday, 17 January, and runs until 28 March, can be viewed online or at one of 40 roadshows.
The first covers the physical changes needed to build a new runway to the northwest of the airport's current boundary.
This looks at the proposed new runway in near Sipson/Harmondsworth, terminal infrastructure, changes to the road network including the A40, the M25 and local rivers.
The airport said it expects to run a further consultation on the subject in 2019 prior to submitting for planning consent.
The second part of the current consultation relates to airspace changes required for an expanded airport. These are a set of rules spelling out how Heathrow intends to use its runways; whether in mixed mode (taking off and landing on the same runway simultaneously) or not.
The consolation is not about future flight paths.
Those roadshows of most interest to Runnymede residents are:
Hythe Centre, in Thorpe Road, Egham Hythe, on Thursday, 1 February
Village Centre in Victoria Street, Englefield Green, on Wednesday, 14 February.
Other locations include:
Windsor Youth and Community Centre in Alma Road, Windsor, on Friday, 2 February
Weybridge Centre in Churchfield House, Churchfield Road, Weybridge, on Saturday, 10 February
The final consultation event will be held at the Cecil Hepworth Playhouse in Hurst Grove, Walton-on-Thames, on Monday, 12 March.
All weekday roadshows run from noon to 8pm, weekend events are open from 10am to 4pm.
For the full list of events click visit: https://www.heathrowconsultation.com/events/
Runway: Located to the northwest of the two existing runways between Sipson in the east, Colnbrook and Brands Hill in the west and Harmondsworth in the north.
Roads and the M25: Proposals for moving the M25 and junctions, as well as local roads including the A40.
Terminals and aprons: Heathrow has identified three areas for future terminal capacity and apron space. It is possible it may need to develop all three areas to support the expanded airport.
River diversions and flood storage: The expansion of Heathrow will extend the airport into the Colne Valley, affecting the routes of watercourses and areas of existing floodplain.
Taxiways: These allow aircraft to move between the aprons and the runways safely and efficiently. The locations will be decided once the position of any potential new runway is known.
Construction: Heathrow will need land in and around the airport for construction-worker offices, industrial plants and maintenance sites, control posts and site entrances, a new railhead, lorry parks, areas to produce, combine and store materials and workforce car-parking. It will also need to consider how to accommodate the construction workforce.
Land use: Major commercial facilities to the northwest of the existing airport would be affected by expansion.
The deadline for responding is 11.55pm on 28 March 2018.
Comment and opinion can be given in a number of ways:
Complete a feedback form, available on request or at the exhibition events
Write in: Freepost LHR EXPANSION CONSULTATION
To feedback on the expansion consultation email to email@example.com
To feedback on the airspace consultation email to firstname.lastname@example.org
All feedback received through these channels will be considered. All the feedback will be recorded but will not be responded to individually.
To have your say visit the Heathrow Expansion Consultation website.