VS5/6 Flight Times

Hello,
Im new to these forums and hoping someone can help me
Im currently booked to travel on VS5/6 from LHR - MIA in March/April next year.
I had a letter through confirming a change to the flights by 25 minutes on the outbound leg from LHR to MIA in March.
I went onto the Virgin Website and noticed that when I fly home in April the VS5 arrives in MIA at 16:05 and then does not depart again well 21:00 nearly a 5 hour turnaround time.
Im just wondering if this is correct or the inbound flight VS6 will be due a change to the flight times shortly.
I need to book a connection at LHR but don't want to book one based on arriving at LHR at 10:40 and then end up arriving earlier.
Any advice would be greatly appreciated
Thanks
ZJC
Im new to these forums and hoping someone can help me

Im currently booked to travel on VS5/6 from LHR - MIA in March/April next year.
I had a letter through confirming a change to the flights by 25 minutes on the outbound leg from LHR to MIA in March.
I went onto the Virgin Website and noticed that when I fly home in April the VS5 arrives in MIA at 16:05 and then does not depart again well 21:00 nearly a 5 hour turnaround time.
Im just wondering if this is correct or the inbound flight VS6 will be due a change to the flight times shortly.
I need to book a connection at LHR but don't want to book one based on arriving at LHR at 10:40 and then end up arriving earlier.
Any advice would be greatly appreciated
Thanks
ZJC