Thanks for all the replies. I have looked at one of the rolled briskets but if I unroll it it will be very thin, so I don't think it will work for my purpose.
What other boneless UK cuts do you folks use for pot roasts? I need something that will stand up to the curing process for the spiced beef, but that is an even thickness (like a flat cut brisket!) so the spices will penetrate.
Thanks
Kathleen