Demystifying TOPS: Is it starting to make sense?

[D365]

Class 165-174: BREL/ABB/ADTranz/Bombardier diesels
Class 175-184: Alstom diesels
Class 185-194: Siemens diesels
Class 195-199: CAF diesels

Class 7x0 (excluding 701): Bombardier "Aventra" EMUs

• Class 710 for London Overground
• Class 720 for Greater Anglia
• Class 730 for West Midlands Trains

Class 7x5 (excluding 777): Stadler "FLIRT" EMUs/EDMUs

• Class 745 and 755 for Greater Anglia

Class 7x7 (excluding 700): Siemens "Desiro City" EMUs

• Class 707 for South Western Railway
• Class 717 for Great Northern

Excluding the Class 7xx outliers as listed above, are we finally starting to see some logic in post-privatisation TOPS designations?

 

[59CosG95]

I suppose Class 33x EMUs are all CAF, so they can be added to the list in a similar fashion.

 

[Domh245]

I suppose Class 33x EMUs are all CAF, so they can be added to the list in a similar fashion.

Other than those pesky 334s

 

[507021]

I think the CAF DMUs should have been Class 190 and 191 personally, but I do agree with the OP's point.

 

[jopsuk]

It's OK, the next time there's a new class it'll ruin whatever logic you think you see there Fully 30% of the 7xx are outliers as it is

 

[507021]

I've just thought, is there a reason why the bi-mode 319s are Class 769 and not Class 719?

 

[Domh245]

I've just thought, is there a reason why the bi-mode 319s are Class 769 and not Class 719?

Because Bi-mode sets have been allocated the 750-799 range of class numbers, 700-749 is reserved for AC and AC/DC EMUs only.

 

[D365]

I've just thought, is there a reason why the bi-mode 319s are Class 769 and not Class 719?

Class 750 upwards is for EDMUs I think - GA Class 755 fits this "rule".

 

[Jowdan Naowsee]

Because Bi-mode sets have been allocated the 750-799 range of class numbers, 700-749 is reserved for AC and AC/DC EMUs only.

Ah that makes sense then as 750 + 19 (from 319) gives you the 769 classification, not quite so random after all!

 

[507021]

Because Bi-mode sets have been allocated the 750-799 range of class numbers, 700-749 is reserved for AC and AC/DC EMUs only.

Class 750 upwards is for EDMUs I think - GA Class 755 fits this "rule".

I forgot about that, thanks both.

 

[TRAX]

The 777 isn’t a Flirt so it’s not an exception to the Stadler rule.

 

[D365]

The 777 isn’t a Flirt so it’s not an exception to the Stadler rule.

It's also not a Boeing

 

[59CosG95]

Other than those pesky 334s

Me, upon discovering that I missed the pesky 334s out...(only bother with the first 5 seconds or so)