Previous meter readings recall when switching

How do I access my previously submitted meter readings when switching so I can challenge the final bill from my previous supplier (estimated readings). When I go to submit a new reading on my bulb account, I can see my previous electricity reading, but I can see my previous gas reading. I definitely submitted both gas and electric (this is a requirement of switching, you can’t proceed without them).

Hi Pete,

Your switch reads are:

Gas - Estimated - 19192
Elec - Your own read - 7602

We did have a reading on your switch date of 19437031 which had a few too many digits. It looks like it would have been 19437 m3.

Please let me know if you have another gas reading and then I can send off a correction using those two pieces of information.