Peugeot 307 went to unlock the car with keyfob and only drivers door and tailgate will open.

Does the car start o.k ?

Car starts fine and runs fine just cant use doors.

Could try a key fob reset . Don't know if this procedure works or not .In the car close all doors , turn key to ignition position ( don't start car ), press and hold the lock button on your key and hold it for 15 seconds, release and remove from barrel. then try it, May have to try a couple of times .There are a couple of fuses related to central locking you could check

Peugeot 307 SW (2006 – 2008) – fuse box diagram
Year of production: 2006, 2007, 2008

Instrument panel fuses
Peugeot 307 SW(2006) - fuse box - fascia box
Peugeot 307 SW(2006) – fuse box – fascia box
Fuse Ampere rating [A] Functions
1 15 Rear wiper
2 30 Locking and deadlocking
3 5 Air bags and pre-tensioners unit
4 10 Brake and clutch pedals switch, engine coolant level switch, steering wheel angle sensor, diagnostic socket, ESP sensor, electrochromatic mirror, particle emission filter pump
5 30 Front electric windows and panoramic roof concealing shutter supply, heated mirrors
6 30 Rear electric windows supply
7 5 Front and rear courtesy lights, map reading lights, glove box light, concealing shutter control
8 20 Audio equipment, audio/telephone, multifunction display, alarm siren, alarm unit, trailer fusebox, steering wheel controls supply
9 30 Front 12 V socket, rear 12 V socket
10 15 Automatic gearbox control unit, STOP switch, tyre under-inflation detection control unit
11 15 Diagnostic socket, low current ignition switch, particle emission filter unit
12 15 Rear parking assistance
13 5 Engine fusebox supply, rain and brightness sensor
14 15 Trailer fusebox, instrument panel, automatic air conditioning, air bags and pre-tensioners unit, hands-free kit
15 30 Locking and deadlocking supply
16 — PARC shunt
17 40 Heated rear screen
Engine compartment fuses (next to battery)
Peugeot 307 SW (2006) - fuse box - engine compartment
Peugeot 307 SW (2006) – fuse box – engine compartment
Fuse Ampere rating [A] Functions
MF1* 30 200 W fan assembly
50 400 W and 460 W fan assembly
MF2* 30 ABS/ESP pump
MF3* 80 ABS/ESP solenoid valves
MF4* 80 Built-in Systems Interface supply
MF5* 50 Built-in Systems Interface supply
MF6* 50 Passenger compartment fuse box
MF8* 70 Power steering electropump assembly


Fuse Ampere rating [A] Functions
1 20 Engine control unit and fan assembly high speed relays supplies
2 15 Horn
3 10 Front and rear wash-wipe
4 20 Headlamp wash
5 15 Fuel pump and purge canister solenoid valve (2 litre petrol)
6 10 Four speed automatic gearbox control unit, automatic gearbox lever locking control, push control switch, fan assembly high speed relay, right and left xenon headlamps
7 10 ABS/ESP control unit, power steering electropump assembly control unit
8 20 Starter control
9 10 Additional heating unit (Diesel), coolant level switch
10 30 Engine control unit actuators (ignition coil, solenoid valves, oxygen sensors, control units, injectors, heaters), purge canister solenoid valve (1.6 litre petrol)
11 40 Air conditioning blower
12 30 Windscreen wipers low/high speed
13 40 Built-in systems interface supply (ignition positive)
14 30 Air pump (2 litre petrol)
15 10 Right main beam headlamp
16 10 Left main beam headlamp
17 15 Left dipped headlamp
18 15 Right dipped headlamp
41 15 Six speed automatic gearbox control unit
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Thanks for all the info will try today and let you know if anything helps.
Keeping everything crossed.
Annoying thing is, this happened the day after it had passed the MOT!

I checked on owners manual about remote locking ,

Locking
Using the remote control
 Press button B to lock the vehicle.
 Press button B for more than
2 seconds to activate the automatic closing of the windows and
sunroof in addition to locking.
Each action is confirmed by fixed
lighting of the direction indicators for
approximately two seconds.
At the same time, the exterior mirrors
fold back.
Deadlocking
This renders the exterior and interior
door controls inoperative.
It also disarms the interior central
locking button.
Unlocking
 Press button C to unlock the vehicle.
This is confirmed by rapid flashing of
the direction indicators for approximately two seconds.
At the same time, the exterior mirrors
unfold.
Using the remote control
 Press button B to lock the vehicle
or press button B for more than
2 seconds to activate the automatic closing of the windows and
sunroof in addition to locking.
 Press the button again within five
seconds to deadlock the vehicle.
Each action is confirmed by fixed
lighting of the direction indicators for
approximately two seconds.

Well I went to check the fuses and came across a problem or two.
There are looms of wires everywhere and I can't clearly see the fuses.
Wasn't like this last time I changed a fuse?
There also appears to be one bunch of wires that is not connected!
I contacted the garage where it had been last and explained.
They are having it back next week to sort it out (hopefully)
Thanks for the locking info.
I had a quick read of the manual and noticed that it didn't say if there was any special way to remove the deadlock. Just unlock, which sadly doesn't work.