Voice agent development for UK organisations that need calls to actually convert.

Strong — voice is the workload where same-zone overlap matters most, and the UK is our best window. India Standard Time is GMT+5:30, which gives roughly four to five hours of native daily overlap with UK business hours — our 1:30pm IST is your 8am GMT, our 6:30pm IST is your 1pm GMT. Daily standups, twice-weekly demos with real call traces (latency-per-turn, hand-off success, conversion numbers), and ad-hoc debugging when a barge-in regression hits production all land inside UK business hours. Written async updates with overnight eval-run results land before your standup. For incidents during peak UK voice traffic (evenings, weekends), an on-call engineer is reachable on the same SLA as a London consultancy.

Yes — and this is the question UK clients ask first. ElevenLabs and Cartesia both ship British English voices that hold a Received Pronunciation accent across an entire call without drifting to American mid-sentence (a failure mode of cheaper TTS that UK customers notice within ten seconds). Regional accents — Yorkshire, Scottish, Welsh, Northern Irish — are available where the use case calls for them; for FCA-regulated voice we usually stick with neutral RP plus optional regional warmth on opening turns. For STT, Deepgram Nova-3 and AssemblyAI both handle British English including regional accents at production-grade word error rates. We do voice auditions in week one — your team picks the voice on a real call sample, not on a marketing demo.

Yes for the controls that affect the agent. SMCR-aware script governance means every outbound call follows an approved script with the required disclosures, recording notice, and complaint-handling pathway — script changes are versioned and audit-logged so SMCR Conduct Rules evidence is exportable. Consumer Duty-aligned vulnerability detection runs as a refusal layer: when the conversation flags vulnerability indicators (financial hardship, cognitive distress, bereavement), the agent escalates to a trained human rather than continuing. Mandatory disclosures (recording notice, marketing call disclosure, regulated-firm identification) are read at fixed positions in the opening turn. We do not provide regulatory compliance advice — we build the controls and ship the audit logs your compliance officer or your SMCR-certified manager can defend.

Yes. Engagement defaults align with UK GDPR, the Data Protection Act 2018, and ICO published guidance on AI and audio processing. Call recordings, transcripts, and prompt logs are encrypted at rest and in transit; retention follows your policy (the agent does not retain audio indefinitely just because storage is cheap). Every model and tool call is audit-logged with timestamp, prompt version, model, input, output, and operator identity — exportable for ICO inspection. A Data Protection Impact Assessment is run for engagements processing audio at scale or operating in a special-category-data context. For lawful basis: outbound campaigns run on legitimate interest with a documented LIA, inbound voice runs on contract performance, and recording opt-in is handled at call start with a clear consent prompt where required.

Your call. We default to AWS eu-west-2 (London), Azure UK South, or GCP europe-west2 for UK clients, and we will run the entire voice build inside your UK cloud account if your DPO requires no cross-region replication and no data egress to non-UK endpoints. For LLM inference, we route Claude or GPT-4o to a UK or EU endpoint where available, or we self-host Llama 3 on vLLM inside your VPC for zero third-party inference. Twilio voice media routes via UK PoPs; Deepgram and ElevenLabs both offer EU-region processing with appropriate DPAs. For clients with strict no-overseas-processing requirements (defence-adjacent, NHS, FCA-supervised at higher risk), we self-host the entire voice pipeline (Whisper STT, open TTS, Llama 3 dialog manager) inside your VPC.

Yes — voice takeover audits are routine. Step one is reading the call recordings and traces, the latency telemetry, the refusal-rate and hand-off-success numbers, the FCA-script-adherence audit, and the cost-per-call data. Step two is shipping the smallest valuable change to prove we understand the system — usually fixing barge-in handling, the escalation threshold, the British TTS voice that drifts to American, or the CRM write-back race condition the previous vendor skipped. Step three is the longer-term rebuild plan if one is needed. Most voice takeovers we see did not need a full rewrite; they needed proper turn-detection, a confidence-based refusal layer, and a senior engineer on the build.

Most v1 voice agent engagements at Aiinfox land between £25,000 and £110,000 fixed-price for a focused build — an outbound campaign, an inbound deflection flow, or an FCA-aware fintech voice agent. Larger multi-quarter engagements with custom fine-tuning, bespoke evals, multi-accent voices, and integration into a regulated platform typically reach £150,000 to £260,000. The cost difference versus a London or Manchester voice AI consultancy lands roughly 30 to 50 percent lower on senior rates — useful, but the headline is the engineer on your kickoff call writes your dialog manager, your CRM integration, your FCA script logic, and your eval suite through launch. No swap-out to a junior pool mid-engagement.

Outbound insurance voice (sub-1-second p95 agent saving 1,400 staff-hours per month and lifting renewal conversion by 28% — the reference build runs in Europe and the stack ports cleanly to UK insurers and brokers), telco support (68% L1 deflection sustained over nine months on a 2M-subscriber bot using the same dialog manager that powers our voice agents), and FCA-adjacent fintech voice for KYC and collections under NDA. Reference calls available under NDA where the client permits. 50+ production systems shipped across 12 verticals — see the documented case studies for the engineering and business outcomes we can show publicly.