Trade Mark Opposition Response Required Urgently

I've received a notice of opposition against my registered trade mark for my product line. A competitor has filed claiming prior rights, and I need someone to review their grounds and help me prepare a substantive counterargument. I have all documentation including my registration certificate, evidence of use, and their opposition notice. The opposition period is closing in three weeks, so timing is tight. I'm a small business owner without in-house legal support, so I need clear advice on whether their claim has merit and what our best strategy is. If we should fight this, I'll need help drafting the response to the UK Intellectual Property Office. What I'm looking for: Assessment of the opposition, strategic advice, and drafting of our formal response submission.