I have quoted the relevant part of HMRC advice [edited] on this matter below. You will see that there is no mention of the relief not being available to companies of your type
'Disposal of shares in or securities of your personal company
If the business is owned by a company in which you dispose of the shares or securities, then throughout the qualifying period of one year the company must be:
• your personal company, and
• either a ‘trading company’, or the holding company of a ‘trading group’, and
• you must be either an officer or employee of that company (or an officer or employee of one or more members of the trading group). A Contacts A company is your personal company if you hold at least 5% of the ordinary share capital and that holding gives you at least 5% of the voting rights in the company.
It is possible for shares acquired under the Enterprise Management Incentive Scheme to qualify for Entrepreneurs’ Relief where the ‘personal company’ requirement is not met (see guidance at CG64052). The one-year qualifying period ends generally on the date of disposal of the shares or securities. The exceptions are where the company ceases to be a trading company, or to be a member of a trading group, within the period of three years before the date of disposal. In such cases the qualifying period ends on the date the company ceased to qualify as a trading company or a member of a trading group. The relief is also available where either:
a) the company is wound up and dissolved with your shares being cancelled and a capital distribution is made in the course of that winding up, or
b) any other capital distribution is made. In these cases, the qualifying conditions must all be met throughout the year ending with:
a) either the date on which the capital distribution is made, or
b) if earlier, the date of cessation of the trading qualification and the capital distribution is made within three years of the cessation.'