I'm thinking of a train class..

[hmp455]

Class 333?

Correct.

Most trains outside London and South East are 2-3 cars long (as far as I know-Saw a two-car EMT 156 today in contrast to an 8-car 455 on Shepperton branch line yesterday)
Similar to Heathrow Express Class 332, operating in London.

Your floor

 

[Class172]

I agree with Temple Meads.

EDIT: answer confirmed

 

[Temple Meads]

1) We have operated in 3 distinct areas of the UK.
2) We once suffered from very poor reliability, although this has now improved.
3) We have been in service for at least 15 years.

 

[Peter Mugridge]

Class 180?

Open floor if so.

 

[hmp455]

Class 158?

 

[Temple Meads]

Neither.

4) This class hasn't got a very good reputation.

 

[Peter Mugridge]

4) Fits the 180s as well!

Right... next guess...

The Junipers?

Three areas: 334 ( Strathclyde ), 458 ( Waterloo - Reading and related diagrams ) and 460 ( Gatwick Express ).

 

[Temple Meads]

Nope.

5) This class currently operates for 2 TOC's.

 

[Matt Taylor]

Class 323?

 

[Temple Meads]

Nope.

6) Upcoming legislation will prevent us from operating on NR.

(This clue should bag it)

 

[Matt Taylor]

Class 121

 

[Temple Meads]

Class 121

No.

We do however operate in 2 countries of the UK.

 

[Matt Taylor]

Class 142

 

[Harry47818]

class 373?

Harry

 

[Temple Meads]

Welcome to the game Harry47818!

8) This class operates mostly local services.

 

[Harry47818]

could i be sneaky and ask what part of the uk i.e. east, west, north or south do these operate? at another guess, class 143?
--- old post above --- --- new post below ---
This subject has gone rather quiet?

 

[Temple Meads]

Sorry for late response.

Class 143 is correct!

 

[Harry47818]

thats okay

1) this one has been quite popular in the rail mags for the wrong reasons lately
2) this was last year threatened by one company to be replaced
3) 4 operators currently operate these

Good luck guessing

 

[hmp455]

Class 156?

 

[Harry47818]

Not quite, good guess though
4)These are used widely over the UK although not all of them are in service but there's still a lot of these in one area

 

[gnolife]

153s?

 

[Harry47818]

nope,
5) these first came into service around 1987/88

 

[gnolife]

Class 158?

 

[Harry47818]

nope
6) these are capable of 100mph

 

[221129]

Class 170 ??

 

[Harry47818]

no i'm afraid

7) This is an electric and not a diesel

(that should give it away more )

 

[221129]

Class 321

 

[Harry47818]

Nope, although everyone's guesses are warm, there not hot
8 ) These are regular at Ipswich

 

[TrainBoy98]

Class 91?

 

[Harry47818]

Your getting very warm now
9) 1 caught fire this year

(That's a massive clue )