HMRC cannot provide any financial planning advice. You would need to seek independant financial planning regarding this.
However, rules on the remittance basis can be found here:
RDRM30000 - Remittance Basis
Residence, domicile and the remittance basis: RDR1
If you need further guidance on any of the contents then please contact an advisor, as each case needs to be reviewed on an individual basis and can therefore be quite complex:
Self Assessment: general enquiries