Belgium
A regular for many years, aircraft used have included DC-6, C-47, Pembroke, C130H, HS748,
Merlin, Islander, Sk61, Puma, Agusta A109, Alouette, Falcon 20, Falcon 900.

.Belgian Merlin's have visited for over 20 years.

  Denmark
Aircraft used have been Douglas C-54, Lockheed C130H, Gulfstream 3, Sea King, Challenger 604.
. Challenger CL604 C-066

  Ireland
Noted have been HS125, Gulfstream 4, Beech 200, Casa Cn235.

  Finland
A rare visitor, although C-47 Dakota's, a Fokker Fk27 and Learjet's have been noted.

  France
Always a prolific user over the years, aircraft used by the French forces include N2501 Noratlas,
C160 Transall , C130 Hercules, N262, Paris, Pa31 Navajo, C411, Breguet Atlantic, Casa Cn235,
Casa Ca212, Dougls C118, Super Frelon, Puma, Gazelle, Embraer Xingu, Falcon 10, Falcon 20,
Falcon 50, Falcon 900, Se210 Caravelle, Sn601 Corvette, Cessna 406, Cessna 310, CM170 Magister.

.MS760 Paris 78/365-LY
.Noratlas 38/64-BC parked on line 2

  Germany
Another long time user, with Lockheed Jetstar's, VFW614, CL601 Challenger, Do28 Skyservant,
Do228, C160 Transall, Antonov An26, Breguet Atlantic, Let 410, Sea King, Bolkow Bo105, Bell UH1,
CH53, HFB320 Hansa Jet.

.Luftwaffe VIP Do28D 59+03
.Heer (German Army) CH53G 84+74.

  Great Britain
Of course many RAF, Royal Navy and Army types have visited here, too numerous to mention. Representitive photo's:

.Shackleton WL747 on the ramp
.Pembroke XL929 in a grey scheme
.Sea Heron XR441 landing at Northolt

  Greece
A rare visitor, with a couple of C130 Hercules and a Gulfstream 1 noted in the late 70's.

  Hungary
Another newer user, only Antonov An26's noted.

  Italy
Aircraft noted over the years include Douglas DC-6, C130 Hercules, Piaggio PD808, Fiat G222,
Piaggio P180 Avanti, Falcon 50, Douglas DC-9, Gulfstream 3

.An Italian G222 in the early 1980's
.P180 Avanti MM62162 on the ramp

  Norway
Noted have been DHC-6 Twin Otter's, C130H Hercules, Falcon 20, plus a couple of P3 Orions.

  Netherlands
Another regular, seen have been Lockheed Neptune, Breguet Atlantic, Lockheed P3C Orion,
Fokker Fk27, Fokker Fk50,Fokker Fk60, Westland Lynx, Alouette, Beech 200

Formerly regular NAF Fk27 C-12
.and one of it's replacements, Fk50 U-05

  Poland
Another newer arrival, only Yakovlev YAK 40's have been used.
.Yak 40  0260 on the ramp

  Portugal
An occasional visitor, with Douglas DC-6, Casa 212, Falcon 20, Falcon 50, C130 Hercules and
an Aerospatiale Puma having been noted

Slovakia
Another recent addition has seen Let 410 and Antonov An24's visit.

..Spain
Still an occasional visitor, Spain has used Falcon 20, Falcon 50, Falcon 900, Lockheed C130H,
Casa Cn235, Citation 550 and Citation C560.

.Spanish Air Force Falcon 20 T.11-1/401-02
.Spanish Navy C560 TR.20-01

  Sweden
Aircraft noted have been Lockheed C130, Beech 200 Super King Air's, Rockwell Sabreliner,
Cessna 404, Douglas C-47, Saab 105, Saab 340, Gulfstream 4

.Swedish C47 79004/794 on the ramp

  Switzerland
More prevelent in recent years, Beech 50, Lear 35 and Falcon 50 noted.

  Turkey
A few aircraft have been used, those being C160 Transall, Vickers Viscount, Citation 650
. C650 ETI-026/93-7026 parked on the disused runway

..Yugoslavia
The former Yugoslavia sent Falcon 50, Yak 40 and Learjet 25 aircraft.

Yugoslav Yak 40 71504 visits Northolt
.Lear 25 70401 on the ramp

Africa/Mid East

Visiting aircraft from this area are few and far between, especially in recent years.  Noted have been:
 

Ghana	The Ghanaian VIP Fk28 visited some years ago
Jordan	Lockheed C130 Hercules visited in the early 1980's
Kenya	Kenya has used Northolt for delivery flights of DHC5's and DHC8's
Morocco	A C130 Hercules visited a couple of times
Nigeria	Sent a  Lockheed C130
Saudi Arabia	Noted have been a Lockheed Jetstar and a Gulfstream  3
Senegal	A Fokker Fk27 visited in 1984
South Africa	Lockheed C130 Hercules were regular visitors in the early 1970's
Zaire	A Lockheed C130 Hercules visited in the late 1970's

America's
Several C130's from Brazil, Chile and Argentina visited during the
early 1970's. Also noted in the early 70's was a Chilean C118!

Brazillian C130H 2464 on the Northolt ramp

  Canada
Several types have visited, including Falcon CC117, Convair CC109, Lockheed CC130,
Lockheed CP140 Orion, Canadair CC132, CC144 Challenger, Bell CH136 and CH124,
CH124 Sea King.

..Australian P3 A9-754 on the ramp

.RNZAF C130 parked at Northolt

United States

Always a prevalent visitor, aircraft noted have included:

US Air Force
Douglas C118, Lockheed C141 Starlifter, Douglas C9A, Beech C12, Douglas C17A,
Gulfstream C20, C21 Learjet, Boeing C22, C23 Sherpa, C130 Hercules, Convair T29,
Bell UH1 Huey, Lockheed C140 Jetstar, Rockwell T39 Sabreliner, Boeing T43,
Gulfstream C37A
  Representing the Air Force is VC140 61-2489 and C9A 71-0876

US Navy/Marines
C1 Trader, C2 Greyhound, Convair C131, Beech UC12, Douglas C118, Gulfstream C20,
SH3, Lockheed C130, P3 Orion, A6 Intruder, CT39 Sabreliner, Sikorsky SH70, Douglas C117
Douglas C9B
  Regulars at Northolt were VP3A 150515 and CT39G 159363.

US Army
Beech U21, Beech (U25), Beech C12, Boeing CH47, Bell UH1 Huey , Bell OH58,
Beech U8, Sikorsky UH60, OV1 Mohawk, OV10 Bronco, Gulfstream 2, UC35A Citation

.Army U21A 18013 in the late 1980's
 

Coast Guard
Gulfstream VC11A, Lockheed C130 Hercules