There's a legal curfew on fireworks in the UK of 11pm. The only exceptions are 5th November (midnight), Diwali, Chinese New Year and New Year's Eve (1am).
Please be aware that some venues may have earlier curfews due to local restrictions or voluntary agreements with local residents and/or landowners. These restrictions may also include limiting the noise of the fireworks - some venues only allow quiet or silent fireworks. There may also be limits on the time until which amplified music can be played outside, or whether amplified music can be played outside at all. Contact us if you'd like to know if there are restrictions on fireworks at your wedding venue.