Tax and National insureance (anybody an expert?)

[marcovan]

Hi Folks

Hopefully someone can help me with an complicated query?
My wife is coming up for her 2.5 years FLRM at end of December. I am seaman / offshore worker and have been doing agency work this year. I am paid a day rate by the agencies. I have worked for two agencies this year and both pay straight day rate in GBP but do not deduct tax or NI at source because I am working internationally, even though both agencies are UK agencies. My Wage slips directly match all bank deposits. I will be doing my tax return for April 2016 to April 2017 and will probably be due to pay some tax and NI. There fore I will have paid tax on earnings before April.
Will this be acceptable evidence for the financial requirement? I was a bit worried that because the tax and NI isn't taken at source by the agency. I can prove that money from before April was taxed using my tax return and an accountant letter, but it still worries me. I can't find any info on this online or in the GOV financial requirements.

Thanks