UK Wireless Microphones Licensing Guide – PMSE, Ofcom & UK Frequency Bands
A practical guide to licensing and frequency choices for wireless microphones (radio mics) and in-ear monitors (IEMs) in the UK, aligned with Ofcom PMSE practice and commonly used UK frequency charts.
1) Who regulates wireless microphone frequencies in the UK?
Wireless microphones and IEMs use radio spectrum. In the UK, spectrum is regulated by Ofcom. Most professional wireless audio use sits under PMSE licensing (Programme Making and Special Events).
Important: If you transmit on frequencies that require a licence, you may be operating illegally. Wide-tuning equipment can tune to frequencies that are not automatically legal for your use.
2) The 3 licensing categories
A) Licence-exempt (free to use, UK-wide)
No licence required, but these bands are shared and can be more vulnerable to interference.
- Channel 70: 863–865 MHz – common licence-exempt UHF option
- 173.7–175.1 MHz – VHF licence-exempt option
- 2.4 GHz – used by many digital wireless systems
- 5.8 GHz – used by some modern digital and dual-band wireless systems
In practice, 2.4 GHz and 5.8 GHz systems are attractive because they avoid traditional UHF licensing, but they still operate in shared spectrum and can be affected by congestion, especially in Wi-Fi-heavy environments.
B) Shared PMSE licence (annual, portable, UK-wide)
This is the standard option for many professional users who want legal, portable access to reliable UHF spectrum.
- Channel 38: 606.5–613.5 MHz
- Channel 65: 823–832 MHz – often used as an additional shared band
Shared licensed access is practical and widely used, but it is still shared rather than interference-proof.
C) Coordinated (site-specific / short-term) PMSE licence
Used for larger events, high channel counts, busy city venues, broadcast, theatre runs, festivals, and complex production environments.
This is the best route when you need a large number of channels and more controlled RF planning.
3) Quick decision chart
| Your situation | Best option | Licence needed? |
|---|---|---|
| Small setup (1–3 mics), casual use | 863–865 MHz, 2.4 GHz, or 5.8 GHz | No |
| Paid gigs / you want more predictable reliability | Channel 38 (606.5–613.5 MHz) | Yes |
| Many mics plus IEMs | Site-specific coordinated PMSE frequencies | Yes |
| Touring venue-to-venue | Shared licensed UHF bands | Yes |
| Very congested RF environment | Avoid relying only on licence-exempt bands | Varies |
4) UK frequency cheat sheet
| Band | Common name | Status | Good for | Notes |
|---|---|---|---|---|
| 173.7–175.1 MHz | VHF licence-exempt | Licence-exempt | Small/simple setups | Limited channel count; less common in modern pro deployments |
| 606.5–613.5 MHz | Channel 38 | Shared PMSE licence | Professional wireless mics | Most common starting point for licensed UK use |
| 614–694 MHz | Interleaved TV spectrum | Usually coordinated | Large productions | Availability depends on location and event coordination |
| 823–832 MHz | Duplex gap | Shared PMSE licence | Additional licensed channels | Common add-on band for extra capacity |
| 863–865 MHz | Licence-exempt UHF | Licence-exempt | Quick and simple deployment | Often crowded; best for low channel counts or backup use |
| 2.4 GHz | Global ISM / Wi-Fi band | Licence-exempt | Convenient digital wireless systems | Can be affected by Wi-Fi congestion and dense RF environments |
| 5.8 GHz | Upper Wi-Fi / SRD band | Licence-exempt for compliant equipment | Some modern digital wireless and dual-band systems | Can offer extra spectrum headroom, but is still shared and equipment-specific |
5) 2.4 GHz and 5.8 GHz: what they really mean in practice
2.4 GHz and 5.8 GHz systems are popular because they avoid traditional UHF PMSE licensing. Some modern wireless systems can operate in both bands and switch or coordinate across them.
Their advantages include:
- No separate PMSE licence for normal compliant operation
- Simple setup for small and medium deployments
- Useful for users who want to avoid UHF frequency planning
Their limitations include:
- They still operate in shared spectrum
- 2.4 GHz can be heavily congested in venues with strong Wi-Fi usage
- 5.8 GHz is not a magic fix; performance depends on the specific system and local RF conditions
- You should confirm that the exact device and band are compliant for UK use
6) Planning and channel-count rules of thumb
| Band | Typical practical channel count | Reliability expectation |
|---|---|---|
| 863–865 MHz | About 2–4 | Low to medium |
| Channel 38 | About 6–12, sometimes more with good coordination | Medium to high |
| 2.4 GHz | Varies widely by manufacturer and local Wi-Fi activity | Medium, environment-dependent |
| 5.8 GHz | Varies widely by manufacturer and product design | Medium, equipment-dependent |
| Coordinated interleaved spectrum | 10–50+ possible depending on event and location | High with proper coordination |
7) Common mistakes
- Assuming tunable means legal: equipment may tune outside the frequencies you are actually allowed to use.
- Overloading licence-exempt bands: 863–865 MHz, 2.4 GHz, and 5.8 GHz all have practical capacity limits.
- Ignoring venue RF conditions: Wi-Fi-heavy venues can affect both 2.4 GHz and 5.8 GHz systems.
- Buying the wrong regional tuning band: always verify the exact UK-compatible block before purchase.
8) Buying checklist
- Choose your licensing strategy first
- For professional UHF use, prioritise equipment that supports Channel 38
- For licence-exempt digital use, confirm whether the system uses 2.4 GHz, 5.8 GHz, or dual-band operation
- Check the exact tuning range printed on the equipment
- Match the system to your real-world channel count and venue type
9) Summary
- Channel 38 remains the most common starting point for licensed professional wireless mic use in the UK.
- 863–865 MHz is licence-exempt but limited and often crowded.
- 2.4 GHz and 5.8 GHz can be very useful for licence-exempt digital wireless systems, especially where simplicity matters.
- 5.8 GHz should be treated as an additional shared digital band, not as guaranteed interference-free spectrum.
- For larger productions, coordinated PMSE licensing is still the best option.
