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* FTSE 100 up 0.3%, FTSE 250 adds 0.5%

Nov 3 (Reuters) - The UK's FTSE 100 opened higher on Friday and was on track for weekly gains, buoyed by the gains in medical products maker Smith+Nephew shares on a rating upgrade, while Bank of England's (BOE) decision to hold interest rates also lifted sentiment.

The exporter-focused FTSE 100 was up 0.3% at 8:10 GMT, on track to mark its biggest weekly gains in seven weeks.

The BoE held rates at a 15-year peak of 5.25% on Thursday and said it did not expect to cut them any time soon.

The industrial metal miners added 1.2% as copper prices rose on a weaker dollar.

The medical equipment and services index climbed 1.8% to lead sectoral gains, lifted by a 2.5% rise in Smith+Nephew after broker JP Morgan raised the stock to "Overweight" from "Neutral".

The mid-cap FTSE 250 gained 0.5% and was set for its biggest weekly gains in a year with a 5.9% jump.

Currys jumped 5.8% after the British electricals retailer agreed to sell its Greek business Kotsovolos to Public Power Corporation for an enterprise value of 175 million pounds ($214 million).

The broader reatilers index advanced 0.3% on the news. (Reporting by Khushi Singh in Bengaluru; Editing by Rashmi Aich)