Apologies let me rephrase.

I will be travelling from Milton Keynes with an outbound at Stanstard and a return flight to Heathrow. The outbound flight is around 3pm and I need to be on a teams call between 11 and 2pm. Meaning I do need to to have an active data connection to stay on the call and cant phone in as I need to present also.

I was looking for a route or station where I could park outside of London I guess and commute to Stanstard and on the return get to the same station easily. I did think Watford for a short while. There may be other better routes. To throw a spanner in the works, I could fly from Heathrow at around the same time and drive to heathrow which is my preferred choice but then i have the issue of being on the meeting and driving which is a not possible.

I hope that makes better sense