OK so no likee my first take on Mech Force-despite it being VERY close to what was actually fielded by 1944...so here goes:
The EMF continued and evolved into 12 organised Mechanised Forces. Funding for this was partially released by the removal of 5th and 6th Infantry Divisions in Home Forces.
Each MF comprises:
HQ and signals squadron (plus HQ protection squadron with 6 tanks)
1 Cavalry regiment (36 Light tanks, 37 Cruisers, 8 AA tanks, 8 armoured cars, 12 liaison cars)(the other 10 cavalry regiments are all mechanised working with the Infantry Divisions, at Corps level or in overseas commands)
1 Tank Battalion (with 61 Matilda II's, 8 lights, 8 AA tanks, 12 liaison cars) (The RTC also has around a dozen independent companies for overseas garrisons)
1 motor rifle battalion (KRRC, RB, plus Guards) (Each battalion includes 6 3" mortars, 12 AA Bren, over 50 carriers of varying versions including 2pdr portee version)
1 RHA regiment (all motorised)(24 guns)
1 RA AA/AT battery (motorised- equipped with a tracked vehicle replacing the Birch Guns with the 3.7" gun mounted operating in dual AA and A/T role-around 12 vehicles)
1 RE squadron
1 MGC Squadron (16 MMG carriers)
plus necessary support (RAMC, RAOC, RASC, etc)
The MF also has seen the reformation of the Machine Gun Corps which adds a single motorised squadron to each MF. The MGC also raise several field battalions for the Infantry Divisions and colonial service.
Mobile Forces can be combined to form Armoured Divisions and have done on one exercise pre war.
In addition to all this there are 6 MF's in the TA, Canada can raise around 6 at a push, Australia can raise at least 3, NZ perhaps 1, South Africa could manage 2-3. UK can raise more as war reserves.
Regarding dispositions on outbreak of the Phoney War out of the 36 available to CIG's :
20 active
9 deployed France/Belgium
3 deployed India
1 deployed Malaya/Singapore- the MF is still experimenting and prior to declaration of war one was headed east to trial tanks in jungle ops..(Yup major butterflies here)
3 in Egypt
1 in Persia
1 deployed to Norway
1 in Burma (there was a tank brigade there IRL)
16 or so inactive
7 in UK training (1 each Canadian, Aus and NZ rest UK)
9 training/being raised (various locations)
Other notes:
The Mobile Forces have been active for over 14 years now hence they know how to cooperate together and are used to forming battlegroups. Radio communications are standard practice and adopted on every vehicle. Support is provided too-you can assume everything that the forces had to learn the hard way about basic mechanised warfare has been learnt (with the occassional exception). Vehicles have also developed and are 1.5 years ahead of real example-hence Matilda II being standard issue and Cruisers instead of awful awful lights. You can also assume there is greater energy towards armoured warfare and development.
The rest of the army is :
10 other cavalry regiments plus Yeomanry regiments and 8 war reserve regiments in armoured car, div recce and other roles
300 plus infantry battalions (around 140 regular, over 150 TA rest war reserve)
Before war there were 4 infantry divisions plus 12 TA, war reserves sees another 8 formed. There are several independent brigades. NZ, Aus, Canada, SA, African colonies and Indian Army between them add another 28 plus infantry divisions.
etc
So thoughts? How does this force fare against Nazi Germany? Bear in mind the Matilda II just laughs at the standard 37mm ATk gun but is vulnerable to the dreaded 88....