Index of multiple deprivation missing for postcodes mispelt with O instead of zero

[mbarton]

Create a new patient with the postcode SE12 OTX. Must use the letter O, not the number zero (which is technically correct).

We get a 500 error calling the IMD endpoint and the patient ends up without one:

django-1 | ERROR [epilepsy12.general_functions.index_multiple_deprivation:32] Could not get deprivation score for M16OEW. Response status 500

Note that 500 error is also what you get from the IMD endpoint for a postcode that doesn't exist, so I think it's probably a lookup issue.

We still use findthatpostcode (see #1096) which is forgiving of this very common formatting error. Unfortunately postcodes.io is not but I don't think it matters as they can just change the postcode during submission.

There are 10 examples in live.

[mbarton]

We've manually fixed the cohort 6 entries for this to unblock data analysis. Moving to postcodes.io would fix this issue as they reject the mispelt postcode. However it doesn't handle retired postcodes (see the comment in #1096 (comment))

[mbarton]

Reopening as we've had another one of these come in