Which other Elizabeth line stations can you change to another type of line without going through barriers? ...for each of these types:
1) Any underground line (excluding DLR)
2) DLR
3) National Rail
As far as I can tell the interchange situation at Elizibeth line stations is as follows.
Reading to West Ealing inclusive: presumablly open interchange with rail services since it's using rail infrastructure.
Ealing broadway: everything (train, tube and lizzie) seems to be behind the same gateline according to the NR maps.
Heathrow: heathrow express and lizzle use the same platforms and hence have open interchange. Underground is behind a seperate gateline (and there is no OSI!).
Paddington: There is an interchange tunnel inside the gatelines from the elizibeth line to the bakerloo. For changing from the elizibeth line to the circle/district platforms I belive you will meet gatelines if you take the signposted route but you can avoid them by going via the bakerloo. Circle/hammersmith platforms have their own gatelines. Mainline platforms have their own gating arragements with some platforms being ungated.
Bond Street to Farringdon inclusive: I'm pretty sure these have open interchange with tube services and with rail services at Farringdon. It's also possible to reach barbican LU from Farringdon EL without passing through barriers, but only by using a somewhat-hidden lift.
Liverpool street: I think that there are open interchanges with Moorgate LU and NR and with Liverpool street LU but i'm not 100% sure. Liverpool street mainline has it's own seperate barriers.
Whitechapel: everything appears to be behind the same gateline.
Stratford: everything is behind the same gateline.
Beyond Stratford: presumablly open interchange with rail services since it's using rail infrastructure.
Canary Warf: despite sharing a name with a tube and DLR station, they are seperate stations some distance apart. The tube and EL stations have their own gateline while the DLR is open with validators.
Custom House: the Elizibeth line part is barriered while the DLR part is not, leading to a messy interchange situtation.
Abbey wood: everything is behind the same barriers.