(note that Airfix also had another Jet Provost T.3 kit #01029, seen on page 2...). 
In September 2016 Airfix released a brand new Jet Provost kit # A02103, see page 3...

Two older kits are built as Jet Provost, an old kit and a later bought kit. 
Starting with the old kit: 

These kit decals comprise 2 schemes:
- Strikemaster mk 52 of Oman Air Force
- Jet Provost mk T.5 of the RAF "Red Pelicans" aerobatic display team

The kit decals were yellowed in one kit and are better replaced....... 

.... and next the later bought kit: 
.
These Airfix kits have about 90 parts each. (Matchbox/ Revell also had a Strikemaster model in 1/72 which is much simpler.)

Many parts are for the stores that comprise wing tanks, drop tanks, bombs. The kit has raised panel lines, I left them that way. When the model is painted it will only be seen at a distance that they are raised and not inscribed. 

On the recently bought Airfix kit, the decals are much better and for a RAF and New Zealand scheme. They are also different as the first kit release seen above. 

Thus 2 models were made of the Jet Provost T.5 version. 

On the real aircraft almost always the undercarriage gear doors are closed on the ground, so there is no need for an actual nose wheel bay, nor any details inside the bays. 

This model really is further a straight forward build, and the model was further made as per instructions. I had some small difficulties to fit the nose strakes (parts 44 + 45) typical for the later Jet Provost. (These strakes helped with spin training). 

Seen are the two inside gear doors (parts 52) in closed position, sand as needed to get a good fit. 

Gap filling with rod was needed at the mid lower wing area. 

For the Jet Provots, no wing tip tanks were fitted. 
I always saw in the control surfaces with a TIGER razorsaw, like the ailerons, rudder and flaps. This makes things look better.
On a model, the ailerons were set at an angle: one down and reversed one slightly up.

Filler was needed particulary at the intakes and the wing root joints. Small amounts of putty were set and sanded after drying out. 

The kit cockpit has two seats that can benefit from some extra detail as well as the cockpit itself. ( A PAVLA resin set can be bought for this, but I simple added details with some plastic card and rod). 

Two models were thus made and when both assembled, they were ready to get the paint schemes. 
 

  Here two old photos I took at the Air Tattoo at Fairford, probably in the early nineties.

Most work with this scheme is to apply with the airbrush the colourfull decal scheme of white, red and grey wing panels. The colour scheme was applied as indicated in the instructions. 

First, the overall model got a light grey base coat. Correct any irregularities as needed. 

For the RAF trainer scheme the colours used were...
White:  Revell acrylic 360301
Red:     Revell acrylic 36131
(these are the paints in the Revell blue square paint containers...)

.... and for the mid wing area of Light grey "BSC381C:627" : Gull Grey FS36440 using Gunze Sangyo acrylic 325

After decalling the model was completed by:
- adding the gears. 
- inside the canopy, I made a piece of flat card to close the huge gap the lower gap and a bulkhead inside the canopy. 
- the seats got each a ejection release handle on top. 
- for the instrument panels, decals were used from the decal spares box. 

A little wash only was applied on the recessed panels of the ailerons and flaps with PROMODELLER wash. 
Finally the model got a decal protecting gloss coat of Johnson Future/ Pledge with the airbrush.

NOTE: Oooops.....I later discovered that I  made a mistake as I glued the intake scoops on the left side and not the correct right side below the canopy...

Some views of the completed model..... 

  RAF JET PROVOST T.5   serial registration  XW423

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and in a "landscape..." 

A nice addition to my RAF British trainer model collection. 

Note: when modelling other Strikemasters later on, I added the forgotton small control rods of the trim tabs on rudder and horizontal stabilizer and the pitot tube below the nose, seen here...
..

I got a nice decal sheet from AIRDECAL, set 7211, Raspberry Ripple PART 2. It has decals for a Jet Provost with serial XS230. 

The Airfix kit was assembled as indicated above as Jet Provost T.5. But note that the small air scoops should be fitted below the RIGHT side of canopy as indicated in the instructions.....

The Bedford paint scheme is quite challenging, but fortunately the AIRDECAL sheet does provide the red demarcation lines and the decals are accurate. 

Colours needed are white, red and blue, using:
White:  Revell acrylic 360301
Red:  Revell acrylic 36131
Blue: Revell acrylic 36156
(these are the paints in the Revell blue square paint containers...)

Start with a light grey base coat using your airbrush. Then do the white overall, mask the red and do the blue.

The AIRDECAL decals are quite brittle buty went on fine.

After applying the decals as per instructions, the final small parts were set onto the model and the cockpit a bit detailed, see above how. Also this model got a decal protecting coat of Johnson Future/ Pledge with the airbrush.

The end result of this colourful model is seen here:

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           BAC JET PROVOST T.5  with registration XS230

Below a later model photo is seen where I added the 3 small trim tab control rods on the stabilizer and vertical tail

How about other British test aircraft, like those at Bedford or the Test Pilot School Boscombe Down? These are also on the AIRDECAL sheet......
 

On to next [ Page 2.... ]
 

Scale Aircraft Modelling, SAM magazine, Key publishing: December 2015 issue with a special with nice profile drawings