Looks like the HP Heathrow is suddenly a possibility for some group travel in late spring. Please indulge a few questions, since my last time to England was pre-pandemic.

1. Bus line is now U3 or U4 - Bath Road, rather than the former Route 423?

2. Will an Oyster Card work? I have an Android and am not that electronic. Wife has a Google Pixel. No Apple.

Thanks