As far as the engine getting up to temperature in the time described sounds about right. I'd treat the cabin temperature as a different issue.
I think I'd be checking to see if the cabin temperature sensor is blocked up (internally) with fluff. I strongly suspect our 1.8 is.
Also when it is cold in the cabin and the engine hot, with the AC on fully auto it will blast a lot of hot air into the footwells until the sensor detects the desired temperature. Once the temperature is reached it will moderate the amount of flow and the temperature of the flow - which can feel like it all of a sudden blows cold (especially over the knees). I strongly suspect that this effect is exacerbated if the temperature sensor is effectively being insulated from temperature changes by being full of fluff so giving a delayed reaction to temperature fluctuations.
Just a theory of course...
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Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk)
Where?:
https://en.wikipedia.org/wiki/Tanelorn
Mods/Retrofits:
PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors
To do:
puddle lights; 2 Din cd/nav to fit; boot release button
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