RE: Beginners Questions
There's obviously two elements to choosing a SIPP. The SIPP administrator/trustee and a broker. If you envisage that you may want to add in some other investments in future e.g. commercial property or gold/silver bullion etc you will probably need to be more discerning when selecting an administrator.
Best to choose a broker most suitable for your trading and/or investing style then match it up with an administrator/trustee.
Some administrators will work with a number of different brokers. My SIPP provider EPML are one of those and you can also switch between brokers if need be, at a cost of course. Their home page on the left side shows some of the brokers they are partnered up with but not all. You would have to give them a call to find out whether they would work with your preferred broker.
I would think for your needs it would be best to start by looking at Stadia Trustees in conjunction with Interactive Brokers. EPML link up with IB but Stadia Trustees annual admin fee is £25 + VAT cheaper. I intend to move over to this arrangement some time in the future once I reach a high level of cash in my SIPP account. Pete on this board, theblackmamba is a long term satisfied client of IB.