You might also be in breach of immigration laws by working as self-employed while on Tier 1 (PSW).
Tier 1 (PSW) policy guidance states:
Tier 1 PSW policy guidance wrote:Successful applicants will be free to seek employment without having a sponsor for the duration of their Tier 1 (Post-Study Work) leave.
On the other hand, Tier 1 (G) policy guidance clearly states:
Tier 1 G policy guidance wrote:Successful applicants will be free to seek employment without having a sponsor or to
take up self-employment/business opportunities in the UK.
Have you checked with UKBA if you're allowed to be self-employed on Tier 1 (PSW)?? If not, suggest that you do.
regards