It may be the cold weather but my car has seen a 3 mpg drop in the last 2 weeks doing the same journey, I've checked tyre pressures and they are fine etc.

It's due it's second service in a couple of thousand miles and I've had to top the oil up, anyone know if this would affect it?

Maybe having the heater blasting out has affected it?

Mine has done the same, at least 3mpg drop, must be the cold weather.

Youre lucky, only dropping mpg in the last couple of weeks! My mpg (37 - 33) has been getting worse in the last few months. I went into the dealer today and asked the service manager what could be wrong? He said 33mpg is very good? I explained that I was traveling the same route every day at the same speed. He said bring it in and we will check it on the diagnotics. This will take 1.5hrs.
I will need to book the car in for the check next week.

Having a dirty air filter will affect mpg. My mpg started to reduce so I checked the air filter and it was very dirty after only 7 months of driving . In contrast the filter in the XYL's MX5 is over 2 years old and still looks like new.

Be warned that the air filter is not changed by LR until the second/30,000 mile service , maybe worth taking a look at it and it's only £7 to replace it.

I will check the air filter although my FL2 is only 5 months old, 5500 miles on the clock.

I will submit a post after I check the filter.

I'll check the filter this weekend as I've just hit 19000 miles, thanks Dave.

Like people have said before, the cold affects it a lot, especially if you do shorter journeys. Reason being that the pre-heater kicks in more during the cold and for longer. That thing will EAT fuel at a serious rate of knots. 09MY FL2 Td4 XS, Style Pack, Privacy Glass, Martinique Blue.. oh so very blue..

I'll go with the cold weather scenario.

If you really want to scare yourself ,

reset the average fuel consumption before a cold start whatch it for the first few miles  Stornoway Grey GS ... What a fine motor ... but not any more ... ... psst look at my gallery!
Company cars ... a thing of the past - May 2013.

Checked air filter and it was like new, however fuel consumption has improved in the last few days, now getting 35.3 mpg on the same route. I will see if things get any better before I take it back to the dealers for a check up.

This may be due to winter fuel spec as the formulation is adjusted to increase resistance to waxing. Petroleum companies only put this in when they need to as it costs a bit more in the additive pacakage.

Try adding 1ml of Millers Diesel Power Plus per litre of fuel in the tank as this not only cleans the system but boosts the Cetane number of the fuel by 2. You should use Millers plus 4 if you have a DPF and this (as you would expect) increases Cetane by 4. Gone... 2013 XS TD4 Manual Firenze Red
Gone... 2008 (09MY) XS Td4 Manual Stornaway Grey
Prior... 2003 G4 Discovery 2, 1998 Disco 1 and 1997 Disco 1 Company car before that
Also gone in Nov'13, after 7.5 yrs, to new owners with time for more TLC - 1980 Series III 88
Current 2015 Discovery Sport HSE 2.0

I was using Millers addative until a couple of weeks ago, It did not seem to make any difference? It's only in the last week to 10 days that my mpg improved after the Millers would have been out of the fuel system. Is it possible the Millers addative could make things worse? Just a thought?

A number of factors come into play here. Drag on the aerodynamic properties of the vehicle. Cold air is much harder to push out of the way - it does make a big difference. - Changes to fuel use due to the fuel/air mixture changes using denser air.
- The temperature of the fuel itself affects how it atomizes before combustion.
- Colder air going through the radiator and pulling more heat out of the cooling system, thus needing more heat input from the engine to maintain an optimum temperature. Remember an engine is a heat machine.